A final thought

- Fixed non-splitting modes on brass tunnels
- Ponder scenes for ejectors and tunnels

src/main/java/com/simibubi/create/content/contraptions/relays/belt/transport/BeltTunnelInteractionHandler.java

@@ -42,7 +42,7 @@ public class BeltTunnelInteractionHandler {
 		}
 
 		World world = beltInventory.belt.getWorld();
-		boolean onServer = !world.isRemote;
+		boolean onServer = !world.isRemote || beltInventory.belt.isVirtual();
 		boolean removed = false;
 		BeltTunnelTileEntity nextTunnel = getTunnelOnSegement(beltInventory, upcomingSegment);
 		
@@ -128,7 +128,7 @@ public class BeltTunnelInteractionHandler {
 		BeltTunnelTileEntity te = getTunnelOnSegement(beltInventory, offset);
 		if (te == null)
 			return;
-		te.flap(side, inward ^ side.getAxis() == Axis.Z);
+		te.flap(side, inward);
 	}
 
 	protected static BeltTunnelTileEntity getTunnelOnSegement(BeltInventory beltInventory, int offset) {

src/main/java/com/simibubi/create/content/logistics/block/belts/tunnel/BeltTunnelTileEntity.java

@@ -147,7 +147,7 @@ public class BeltTunnelTileEntity extends SmartTileEntity implements IInstanceRe
 		if (world.isRemote) {
 			if (flaps.containsKey(side))
 				flaps.get(side)
-					.set(inward ? -1 : 1);
+					.set(inward ^ side.getAxis() == Axis.Z ? -1 : 1);
 			return;
 		}
 

src/main/java/com/simibubi/create/content/logistics/block/belts/tunnel/BrassTunnelTileEntity.java

@@ -115,7 +115,7 @@ public class BrassTunnelTileEntity extends BeltTunnelTileEntity {
 			return;
 		if (stackToDistribute.isEmpty() && !syncedOutputActive)
 			return;
-		if (world.isRemote)
+		if (world.isRemote && !isVirtual())
 			return;
 
 		if (distributionProgress == -1) {
@@ -206,6 +206,7 @@ public class BrassTunnelTileEntity extends BeltTunnelTileEntity {
 		SelectionMode mode = selectionMode.get();
 		boolean force = mode == SelectionMode.FORCED_ROUND_ROBIN || mode == SelectionMode.FORCED_SPLIT;
 		boolean split = mode == SelectionMode.FORCED_SPLIT || mode == SelectionMode.SPLIT;
+		boolean robin = mode == SelectionMode.FORCED_ROUND_ROBIN || mode == SelectionMode.ROUND_ROBIN;
 
 		if (mode == SelectionMode.RANDOMIZE)
 			indexStart = rand.nextInt(amountTargets);
@@ -265,6 +266,8 @@ public class BrassTunnelTileEntity extends BeltTunnelTileEntity {
 							remainingOutputs--;
 						if (!simulate)
 							full.add(pair);
+						if (robin)
+							break;
 						continue;
 					} else if (!remainder.isEmpty() && !simulate) {
 						full.add(pair);
@@ -336,7 +339,7 @@ public class BrassTunnelTileEntity extends BeltTunnelTileEntity {
 				return null;
 			ItemStack result = sideOutput.handleInsertion(stack, side, simulate);
 			if (result.isEmpty() && !simulate)
-				tunnel.flap(side, true);
+				tunnel.flap(side, false);
 			return result;
 		}
 

src/main/java/com/simibubi/create/content/logistics/block/depot/DepotBehaviour.java

@@ -80,7 +80,7 @@ public class DepotBehaviour extends TileEntityBehaviour {
 			TransportedItemStack ts = iterator.next();
 			if (!tick(ts))
 				continue;
-			if (world.isRemote)
+			if (world.isRemote && !tileEntity.isVirtual())
 				continue;
 			if (heldItem == null) {
 				heldItem = ts;

src/main/java/com/simibubi/create/content/logistics/block/depot/EjectorTileEntity.java

@@ -135,7 +135,8 @@ public class EjectorTileEntity extends KineticTileEntity {
 			world.getEntitiesWithinAABB(Entity.class, new AxisAlignedBB(pos).grow(-1 / 16f, 0, -1 / 16f));
 
 		// Launch Items
-		if (!world.isRemote)
+		boolean doLogic = !world.isRemote || isVirtual();
+		if (doLogic)
 			launchItems();
 
 		// Launch Entities
@@ -169,11 +170,13 @@ public class EjectorTileEntity extends KineticTileEntity {
 			AllPackets.channel.sendToServer(new EjectorElytraPacket(pos));
 		}
 
-		if (!world.isRemote) {
+		if (doLogic) {
 			lidProgress.chase(1, .8f, Chaser.EXP);
 			state = State.LAUNCHING;
-			world.playSound(null, pos, SoundEvents.BLOCK_WOODEN_TRAPDOOR_CLOSE, SoundCategory.BLOCKS, .35f, 1f);
-			world.playSound(null, pos, SoundEvents.BLOCK_CHEST_OPEN, SoundCategory.BLOCKS, .1f, 1.4f);
+			if (!world.isRemote) {
+				world.playSound(null, pos, SoundEvents.BLOCK_WOODEN_TRAPDOOR_CLOSE, SoundCategory.BLOCKS, .35f, 1f);
+				world.playSound(null, pos, SoundEvents.BLOCK_CHEST_OPEN, SoundCategory.BLOCKS, .1f, 1.4f);
+			}
 		}
 	}
 
@@ -369,6 +372,8 @@ public class EjectorTileEntity extends KineticTileEntity {
 			return;
 		if (presentStackSize < maxStackSize.getValue())
 			return;
+		if (depotBehaviour.heldItem != null && depotBehaviour.heldItem.beltPosition < .49f)
+			return;
 
 		Direction funnelFacing = getFacing().getOpposite();
 		ItemStack held = depotBehaviour.getHeldItemStack();
@@ -502,6 +507,9 @@ public class EjectorTileEntity extends KineticTileEntity {
 				NBTUtil.readBlockPos(compound.getCompound("EarlyTargetPos")));
 			earlyTargetTime = compound.getFloat("EarlyTargetTime");
 		}
+
+		if (compound.contains("ForceAngle"))
+			lidProgress.startWithValue(compound.getFloat("ForceAngle"));
 	}
 
 	public void updateSignal() {

src/main/java/com/simibubi/create/foundation/ponder/content/EjectorScenes.java

@@ -0,0 +1,373 @@
+package com.simibubi.create.foundation.ponder.content;
+
+import com.simibubi.create.AllBlocks;
+import com.simibubi.create.AllItems;
+import com.simibubi.create.content.logistics.block.depot.EjectorTileEntity;
+import com.simibubi.create.foundation.gui.AllIcons;
+import com.simibubi.create.foundation.ponder.ElementLink;
+import com.simibubi.create.foundation.ponder.SceneBuilder;
+import com.simibubi.create.foundation.ponder.SceneBuildingUtil;
+import com.simibubi.create.foundation.ponder.Selection;
+import com.simibubi.create.foundation.ponder.elements.InputWindowElement;
+import com.simibubi.create.foundation.ponder.elements.ParrotElement;
+import com.simibubi.create.foundation.ponder.elements.WorldSectionElement;
+import com.simibubi.create.foundation.utility.NBTHelper;
+import com.simibubi.create.foundation.utility.Pointing;
+
+import net.minecraft.entity.Entity;
+import net.minecraft.entity.item.ItemEntity;
+import net.minecraft.item.ItemStack;
+import net.minecraft.util.Direction;
+import net.minecraft.util.math.AxisAlignedBB;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Vec3d;
+import net.minecraftforge.items.ItemHandlerHelper;
+
+public class EjectorScenes {
+
+	public static void ejector(SceneBuilder scene, SceneBuildingUtil util) {
+		scene.title("weighted_ejector", "Using Weighted Ejectors");
+		scene.configureBasePlate(0, 0, 5);
+		scene.showBasePlate();
+
+		BlockPos ejectorPos = util.grid.at(4, 1, 2);
+		Selection ejectorS = util.select.position(ejectorPos);
+		BlockPos targetPos = util.grid.at(0, 1, 2);
+		Selection targetS = util.select.position(targetPos);
+
+		scene.world.setBlock(targetPos, AllBlocks.ANDESITE_CASING.getDefaultState(), false);
+		scene.idle(5);
+		scene.world.showSection(targetS, Direction.DOWN);
+
+		scene.idle(10);
+		ItemStack asStack = AllBlocks.WEIGHTED_EJECTOR.asStack();
+		scene.overlay.showControls(new InputWindowElement(util.vector.topOf(targetPos), Pointing.DOWN).rightClick()
+			.whileSneaking()
+			.withItem(asStack), 50);
+		scene.idle(7);
+		Object slot = new Object();
+		scene.overlay.chaseBoundingBoxOutline(PonderPalette.OUTPUT, slot, new AxisAlignedBB(targetPos), 160);
+
+		scene.overlay.showText(70)
+			.attachKeyFrame()
+			.colored(PonderPalette.OUTPUT)
+			.text("Sneak and Right-Click holding an Ejector to select its target location")
+			.pointAt(util.vector.blockSurface(targetPos, Direction.WEST))
+			.placeNearTarget();
+		scene.idle(80);
+		scene.overlay.showControls(new InputWindowElement(util.vector.topOf(ejectorPos), Pointing.DOWN).rightClick()
+			.withItem(asStack), 50);
+		scene.idle(7);
+		scene.world.setKineticSpeed(ejectorS, 0);
+		scene.world.modifyTileNBT(ejectorS, EjectorTileEntity.class, nbt -> {
+			NBTHelper.writeEnum(nbt, "State", EjectorTileEntity.State.RETRACTING);
+			nbt.putFloat("ForceAngle", 1);
+		});
+		scene.world.showSection(ejectorS, Direction.DOWN);
+		scene.idle(10);
+
+		scene.overlay.showText(60)
+			.colored(PonderPalette.OUTPUT)
+			.text("The placed ejector will now launch objects to the marked location")
+			.pointAt(util.vector.blockSurface(ejectorPos, Direction.WEST))
+			.placeNearTarget();
+		scene.idle(70);
+
+		slot = new Object();
+		AxisAlignedBB bb = new AxisAlignedBB(ejectorPos.west());
+		scene.overlay.chaseBoundingBoxOutline(PonderPalette.OUTPUT, slot, bb, 20);
+		scene.idle(10);
+		scene.overlay.chaseBoundingBoxOutline(PonderPalette.GREEN, slot, bb.expand(-15, 15, 0), 100);
+		scene.idle(10);
+
+		scene.overlay.showText(60)
+			.attachKeyFrame()
+			.colored(PonderPalette.GREEN)
+			.text("A valid target can be at any height or distance within range")
+			.pointAt(util.vector.blockSurface(targetPos, Direction.WEST))
+			.placeNearTarget();
+		scene.idle(70);
+		scene.overlay.chaseBoundingBoxOutline(PonderPalette.RED, new Object(), bb.offset(-2, 0, -1), 60);
+		scene.idle(10);
+		scene.overlay.showText(50)
+			.colored(PonderPalette.RED)
+			.text("They cannot however be off to a side")
+			.pointAt(util.vector.blockSurface(targetPos.north()
+				.east(), Direction.WEST))
+			.placeNearTarget();
+		scene.idle(70);
+		scene.overlay.showSelectionWithText(util.select.position(ejectorPos.west()), 70)
+			.colored(PonderPalette.OUTPUT)
+			.text("If no valid Target was selected, it will simply target the block directly in front")
+			.placeNearTarget();
+		scene.idle(80);
+
+		scene.world.showSection(util.select.position(3, 0, 5), Direction.UP);
+		scene.world.showSection(util.select.fromTo(4, 1, 5, 4, 1, 3), Direction.DOWN);
+		scene.idle(12);
+		scene.world.setKineticSpeed(ejectorS, 32);
+		scene.idle(10);
+		scene.overlay.showText(50)
+			.attachKeyFrame()
+			.text("Supply Rotational Force in order to charge it up")
+			.pointAt(util.vector.topOf(4, 1, 3))
+			.placeNearTarget();
+		scene.idle(60);
+
+		ItemStack copperBlock = AllBlocks.COPPER_BLOCK.asStack();
+		ItemStack copperIngot = AllItems.COPPER_INGOT.asStack();
+		scene.overlay.showControls(new InputWindowElement(util.vector.topOf(ejectorPos)
+			.add(0.5, 0, 0), Pointing.RIGHT).withItem(copperBlock), 30);
+		scene.idle(7);
+		scene.world.createItemOnBeltLike(ejectorPos, Direction.NORTH, copperBlock);
+		scene.idle(20);
+		scene.overlay.showText(50)
+			.text("Items placed on the ejector cause it to trigger")
+			.pointAt(util.vector.topOf(ejectorPos))
+			.placeNearTarget();
+		scene.idle(60);
+
+		scene.world.modifyEntities(ItemEntity.class, Entity::remove);
+		scene.world.hideSection(targetS, Direction.SOUTH);
+		scene.idle(15);
+		scene.world.restoreBlocks(targetS);
+		scene.world.showSection(targetS, Direction.SOUTH);
+		scene.idle(10);
+		scene.world.createItemOnBeltLike(targetPos, Direction.SOUTH, copperIngot);
+		scene.idle(20);
+		scene.world.createItemOnBeltLike(ejectorPos, Direction.SOUTH, copperBlock);
+		scene.overlay.showText(60)
+			.attachKeyFrame()
+			.text("If Inventories are targeted, the ejector will wait until there is space")
+			.pointAt(util.vector.topOf(targetPos))
+			.placeNearTarget();
+		scene.idle(70);
+		scene.effects.indicateSuccess(targetPos);
+		scene.world.removeItemsFromBelt(targetPos);
+		scene.idle(40);
+		scene.world.hideSection(targetS, Direction.NORTH);
+		scene.idle(15);
+		scene.world.setBlock(targetPos, AllBlocks.ANDESITE_CASING.getDefaultState(), false);
+		scene.world.showSection(targetS, Direction.NORTH);
+
+		Vec3d input = util.vector.of(4.8, 1 + 12 / 16f, 2.5);
+		Vec3d topOfSlot = input.add(0, 2 / 16f, 0);
+		scene.overlay.showControls(new InputWindowElement(topOfSlot, Pointing.DOWN).scroll()
+			.withWrench(), 60);
+		scene.overlay.showFilterSlotInput(input, 80);
+		scene.idle(10);
+		scene.overlay.showText(80)
+			.attachKeyFrame()
+			.text("Using the Wrench, a required Stack Size can be configured")
+			.pointAt(topOfSlot)
+			.placeNearTarget();
+		scene.world.modifyTileNBT(ejectorS, EjectorTileEntity.class, nbt -> {
+			nbt.putInt("ScrollValue", 10);
+		});
+		scene.idle(90);
+
+		scene.world.showSection(util.select.fromTo(5, 1, 0, 4, 1, 1), Direction.DOWN);
+		scene.world.showSection(util.select.position(5, 0, 1), Direction.UP);
+		scene.idle(15);
+
+		BlockPos beltPos = util.grid.at(4, 1, 0);
+		scene.world.createItemOnBeltLike(beltPos, Direction.UP, copperBlock);
+		scene.overlay.showText(100)
+			.text("It is now limited to this stack size, and only activates when its held stack reaches this amount")
+			.pointAt(util.vector.topOf(ejectorPos))
+			.placeNearTarget();
+		for (int i = 0; i < 4; i++) {
+			scene.idle(20);
+			scene.world.createItemOnBeltLike(beltPos, Direction.UP, copperBlock);
+		}
+		scene.idle(20);
+		scene.world.createItemOnBeltLike(beltPos, Direction.UP, ItemHandlerHelper.copyStackWithSize(copperBlock, 15));
+		scene.idle(80);
+
+		scene.world.hideSection(util.select.fromTo(5, 1, 0, 4, 1, 1), Direction.UP);
+		scene.world.hideSection(util.select.position(5, 0, 1), Direction.DOWN);
+		scene.idle(30);
+		scene.world.modifyEntities(ItemEntity.class, Entity::remove);
+
+		scene.addKeyframe();
+		ElementLink<ParrotElement> birb = scene.special.createBirb(util.vector.topOf(ejectorPos)
+			.add(0, -3 / 16f, 0), ParrotElement.FlappyPose::new);
+		scene.idle(15);
+		scene.world.modifyTileEntity(ejectorPos, EjectorTileEntity.class, ejector -> ejector.activateDeferred());
+		scene.special.moveParrot(birb, util.vector.of(-2, 3, 0), 5);
+		scene.special.rotateParrot(birb, 0, 360 * 2, 0, 21);
+		scene.idle(5);
+		scene.special.moveParrot(birb, util.vector.of(-1, 0, 0), 3);
+		scene.idle(3);
+		scene.special.moveParrot(birb, util.vector.of(-0.75, -1, 0), 6);
+		scene.idle(6);
+		scene.special.moveParrot(birb, util.vector.of(-0.25, -2 + 3 / 16f, 0), 12);
+		scene.idle(15);
+		scene.special.changeBirbPose(birb, ParrotElement.FaceCursorPose::new);
+		scene.overlay.showText(80)
+			.text("Other Entities will always trigger an Ejector when stepping on it")
+			.pointAt(util.vector.topOf(targetPos))
+			.placeNearTarget();
+
+	}
+
+	public static void splitY(SceneBuilder scene, SceneBuildingUtil util) {
+		scene.title("weighted_ejector_tunnel", "Splitting item stacks using Weighted Ejectors");
+		scene.configureBasePlate(0, 0, 5);
+		scene.world.showSection(util.select.layer(0), Direction.UP);
+		scene.idle(5);
+		scene.world.showSection(util.select.fromTo(4, 1, 5, 0, 1, 3), Direction.DOWN);
+		scene.idle(5);
+		scene.world.showSection(util.select.position(2, 2, 3), Direction.DOWN);
+		scene.idle(10);
+		scene.world.showSection(util.select.position(2, 1, 2), Direction.SOUTH);
+		scene.idle(5);
+		scene.world.showSection(util.select.fromTo(4, 1, 2, 3, 1, 1), Direction.SOUTH);
+		scene.world.showSection(util.select.fromTo(2, 1, 1, 2, 1, 0), Direction.SOUTH);
+		scene.idle(10);
+
+		BlockPos ejectorPos = util.grid.at(2, 1, 2);
+
+		scene.overlay.showText(80)
+			.attachKeyFrame()
+			.text("Combined with Brass Tunnels, Ejectors can split item stacks by specific amounts")
+			.pointAt(util.vector.topOf(ejectorPos))
+			.placeNearTarget();
+		scene.idle(90);
+
+		BlockPos tunnel = util.grid.at(2, 2, 3);
+		scene.overlay.showControls(new InputWindowElement(util.vector.topOf(tunnel), Pointing.DOWN).scroll()
+			.withWrench(), 70);
+		scene.idle(10);
+		scene.overlay.showControls(
+			new InputWindowElement(util.vector.topOf(tunnel), Pointing.UP).showing(AllIcons.I_TUNNEL_PREFER_NEAREST),
+			60);
+		scene.overlay.showCenteredScrollInput(tunnel, Direction.UP, 100);
+		scene.idle(10);
+		scene.overlay.showText(100)
+			.attachKeyFrame()
+			.colored(PonderPalette.BLUE)
+			.text("First, configure the Brass Tunnel to 'Prefer Nearest', in order to prioritize its side output")
+			.pointAt(util.vector.topOf(tunnel))
+			.placeNearTarget();
+		scene.idle(110);
+
+		Vec3d input = util.vector.of(2.5, 1 + 12 / 16f, 2.8);
+		Vec3d topOfSlot = input.add(0, 2 / 16f, 0);
+		scene.overlay.showControls(new InputWindowElement(topOfSlot, Pointing.DOWN).scroll()
+			.withWrench(), 60);
+		scene.overlay.showFilterSlotInput(input, 80);
+		scene.idle(10);
+		scene.overlay.showText(80)
+			.attachKeyFrame()
+			.text("The Stack Size set on the Ejector now determines the amount to be split off")
+			.pointAt(topOfSlot)
+			.placeNearTarget();
+		scene.world.modifyTileNBT(util.select.position(2, 1, 2), EjectorTileEntity.class, nbt -> {
+			nbt.putInt("ScrollValue", 10);
+		});
+		scene.idle(90);
+
+		scene.overlay.showControls(new InputWindowElement(util.vector.topOf(util.grid.at(4, 1, 3)), Pointing.DOWN)
+			.withItem(AllItems.COPPER_INGOT.asStack()), 20);
+		scene.idle(7);
+		scene.world.createItemOnBelt(util.grid.at(4, 1, 3), Direction.UP, AllItems.COPPER_INGOT.asStack(64));
+		scene.idle(40);
+		scene.world.multiplyKineticSpeed(util.select.everywhere(), 1 / 16f);
+		scene.overlay.showText(80)
+			.attachKeyFrame()
+			.text("While a new stack of the configured size exits the side output...")
+			.pointAt(util.vector.blockSurface(util.grid.at(2, 1, 1), Direction.WEST))
+			.placeNearTarget();
+		scene.idle(90);
+		scene.overlay.showText(80)
+			.text("...the remainder will continue on its path")
+			.pointAt(util.vector.blockSurface(util.grid.at(0, 1, 3), Direction.UP))
+			.placeNearTarget();
+		scene.idle(90);
+		scene.world.multiplyKineticSpeed(util.select.everywhere(), 16f);
+	}
+
+	public static void redstone(SceneBuilder scene, SceneBuildingUtil util) {
+		scene.title("weighted_ejector_redstone", "Controlling Weighted Ejectors with Redstone");
+		scene.configureBasePlate(0, 0, 5);
+		scene.world.showSection(util.select.layer(0), Direction.UP);
+		scene.idle(5);
+		scene.world.showSection(util.select.fromTo(4, 1, 3, 4, 1, 5), Direction.DOWN);
+		scene.idle(5);
+		scene.world.showSection(util.select.fromTo(0, 1, 2, 0, 2, 2), Direction.DOWN);
+		scene.idle(10);
+		scene.world.showSection(util.select.position(4, 1, 2), Direction.SOUTH);
+		scene.idle(5);
+		Selection redstone = util.select.fromTo(3, 1, 2, 2, 1, 2);
+		scene.world.showSection(redstone, Direction.EAST);
+
+		BlockPos ejectorPos = util.grid.at(4, 1, 2);
+		Vec3d topOf = util.vector.topOf(ejectorPos.up(2));
+		ItemStack copper = AllItems.COPPER_INGOT.asStack();
+
+		for (int i = 0; i < 3; i++) {
+			scene.world.createItemEntity(topOf, util.vector.of(0, 0.1, 0), copper);
+			scene.idle(12);
+			scene.world.modifyEntities(ItemEntity.class, Entity::remove);
+			scene.world.createItemOnBeltLike(ejectorPos, Direction.UP, copper);
+			scene.idle(20);
+			if (i == 1) {
+				scene.world.toggleRedstonePower(redstone);
+				scene.effects.indicateRedstone(util.grid.at(2, 1, 2));
+				scene.world.modifyTileNBT(util.select.position(4, 1, 2), EjectorTileEntity.class,
+					nbt -> nbt.putBoolean("Powered", true));
+			}
+		}
+
+		scene.idle(10);
+		scene.overlay.showText(60)
+			.colored(PonderPalette.RED)
+			.attachKeyFrame()
+			.pointAt(util.vector.topOf(ejectorPos))
+			.placeNearTarget()
+			.text("When powered by Redstone, Ejectors will not activate");
+		scene.idle(70);
+
+		scene.world.toggleRedstonePower(redstone);
+		scene.idle(2);
+		scene.world.modifyTileNBT(util.select.position(4, 1, 2), EjectorTileEntity.class,
+			nbt -> nbt.putBoolean("Powered", false));
+		scene.idle(5);
+		scene.world.hideSection(redstone, Direction.WEST);
+		scene.idle(10);
+		ElementLink<WorldSectionElement> observer =
+			scene.world.showIndependentSection(util.select.position(4, 1, 1), Direction.SOUTH);
+		scene.world.moveSection(observer, util.vector.of(0.5, 1.5, -0.5), 0);
+		scene.world.rotateSection(observer, 0, 30 - 180, 0, 0);
+		scene.idle(20);
+		scene.world.moveSection(observer, util.vector.of(-0.5, -1.5, 0.5), 10);
+		scene.world.rotateSection(observer, 0, -30 + 180, 0, 10);
+		scene.world.showSection(util.select.position(4, 1, 0), Direction.SOUTH);
+
+		Selection observerRedstone = util.select.fromTo(4, 1, 1, 4, 1, 0);
+		for (int i = 0; i < 6; i++) {
+			scene.world.createItemEntity(topOf, util.vector.of(0, 0.1, 0), copper);
+			scene.idle(12);
+			scene.world.modifyEntities(ItemEntity.class, Entity::remove);
+			scene.world.createItemOnBeltLike(ejectorPos, Direction.UP, copper);
+			scene.idle(1);
+			scene.world.toggleRedstonePower(observerRedstone);
+			scene.effects.indicateRedstone(util.grid.at(4, 1, 1));
+			scene.idle(3);
+			scene.world.toggleRedstonePower(observerRedstone);
+			scene.idle(16);
+			if (i == 3)
+				scene.markAsFinished();
+			if (i == 1) {
+				scene.overlay.showText(60)
+					.attachKeyFrame()
+					.pointAt(util.vector.blockSurface(util.grid.at(4, 1, 1), Direction.NORTH))
+					.placeNearTarget()
+					.text("Furthermore, Observers can detect when Ejectors activate");
+			}
+		}
+
+	}
+
+}

src/main/java/com/simibubi/create/foundation/ponder/content/PonderIndex.java

@@ -96,6 +96,10 @@ public class PonderIndex {
 			ProcessingScenes::emptyBlazeBurner);
 		PonderRegistry.addStoryBoard(AllBlocks.BLAZE_BURNER, "blaze_burner", ProcessingScenes::blazeBurner);
 		PonderRegistry.addStoryBoard(AllBlocks.DEPOT, "depot", BeltScenes::depot);
+		PonderRegistry.forComponents(AllBlocks.WEIGHTED_EJECTOR)
+			.addStoryBoard("weighted_ejector/eject", EjectorScenes::ejector)
+			.addStoryBoard("weighted_ejector/split", EjectorScenes::splitY)
+			.addStoryBoard("weighted_ejector/redstone", EjectorScenes::redstone);
 
 		// Crafters
 		PonderRegistry.forComponents(AllBlocks.MECHANICAL_CRAFTER)
@@ -121,6 +125,12 @@ public class PonderIndex {
 			.addStoryBoard("funnels/transposer", FunnelScenes::transposer);
 		PonderRegistry.addStoryBoard(AllBlocks.ANDESITE_FUNNEL, "funnels/brass", FunnelScenes::brass);
 
+		// Tunnels
+		PonderRegistry.addStoryBoard(AllBlocks.ANDESITE_TUNNEL, "tunnels/andesite", TunnelScenes::andesite);
+		PonderRegistry.forComponents(AllBlocks.BRASS_TUNNEL)
+			.addStoryBoard("tunnels/brass", TunnelScenes::brass)
+			.addStoryBoard("tunnels/brass_modes", TunnelScenes::brassModes);
+
 		// Chassis & Super Glue
 		PonderRegistry.forComponents(AllBlocks.LINEAR_CHASSIS, AllBlocks.SECONDARY_LINEAR_CHASSIS)
 			.addStoryBoard("chassis/linear_group", ChassisScenes::linearGroup, PonderTag.CONTRAPTION_ASSEMBLY)

src/main/java/com/simibubi/create/foundation/ponder/content/TunnelScenes.java

@@ -0,0 +1,564 @@
+package com.simibubi.create.foundation.ponder.content;
+
+import java.util.Vector;
+
+import com.simibubi.create.AllItems;
+import com.simibubi.create.content.contraptions.relays.belt.BeltBlock;
+import com.simibubi.create.content.contraptions.relays.belt.BeltTileEntity;
+import com.simibubi.create.content.logistics.block.belts.tunnel.BrassTunnelTileEntity;
+import com.simibubi.create.foundation.gui.AllIcons;
+import com.simibubi.create.foundation.ponder.ElementLink;
+import com.simibubi.create.foundation.ponder.SceneBuilder;
+import com.simibubi.create.foundation.ponder.SceneBuildingUtil;
+import com.simibubi.create.foundation.ponder.elements.InputWindowElement;
+import com.simibubi.create.foundation.ponder.elements.WorldSectionElement;
+import com.simibubi.create.foundation.tileEntity.behaviour.filtering.SidedFilteringBehaviour;
+import com.simibubi.create.foundation.tileEntity.behaviour.scrollvalue.ScrollOptionBehaviour;
+import com.simibubi.create.foundation.utility.Iterate;
+import com.simibubi.create.foundation.utility.NBTHelper;
+import com.simibubi.create.foundation.utility.Pointing;
+import com.simibubi.create.foundation.utility.VecHelper;
+
+import net.minecraft.block.BlockState;
+import net.minecraft.block.Blocks;
+import net.minecraft.entity.Entity;
+import net.minecraft.entity.item.ItemEntity;
+import net.minecraft.item.ItemStack;
+import net.minecraft.item.Items;
+import net.minecraft.util.Direction;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Vec3d;
+
+public class TunnelScenes {
+
+	public static void andesite(SceneBuilder scene, SceneBuildingUtil util) {
+		scene.title("andesite_tunnel", "Using Andesite Tunnels");
+		scene.configureBasePlate(0, 0, 5);
+
+		scene.world.cycleBlockProperty(util.grid.at(2, 1, 2), BeltBlock.CASING);
+
+		scene.world.showSection(util.select.layer(0), Direction.UP);
+		scene.idle(5);
+		scene.world.showSection(util.select.fromTo(4, 1, 5, 4, 1, 3), Direction.DOWN);
+		scene.idle(5);
+		scene.world.showSection(util.select.fromTo(4, 1, 2, 0, 1, 2), Direction.SOUTH);
+		scene.idle(10);
+
+		Vector<ElementLink<WorldSectionElement>> tunnels = new Vector<>(3);
+		for (int i = 0; i < 3; i++) {
+			tunnels.add(scene.world.showIndependentSection(util.select.position(1 + i, 2, 4), Direction.DOWN));
+			scene.world.moveSection(tunnels.get(i), util.vector.of(0, 0, -2), 0);
+			scene.idle(4);
+		}
+
+		for (int i = 0; i < 3; i++) {
+			scene.world.cycleBlockProperty(util.grid.at(1 + i, 1, 2), BeltBlock.CASING);
+			scene.world.modifyTileNBT(util.select.position(1 + i, 1, 2), BeltTileEntity.class,
+				nbt -> NBTHelper.writeEnum(nbt, "Casing", BeltTileEntity.CasingType.ANDESITE), true);
+			scene.idle(4);
+		}
+
+		scene.overlay.showText(60)
+			.attachKeyFrame()
+			.pointAt(util.vector.topOf(util.grid.at(1, 2, 2)))
+			.placeNearTarget()
+			.text("Andesite Tunnels can be used to cover up your belts");
+		scene.idle(70);
+
+		for (int i = 0; i < 3; i++) {
+			scene.world.cycleBlockProperty(util.grid.at(1 + i, 1, 2), BeltBlock.CASING);
+			scene.world.hideIndependentSection(tunnels.get(i), Direction.UP);
+			scene.idle(4);
+		}
+		scene.idle(10);
+		scene.world.showSection(util.select.fromTo(2, 1, 0, 0, 1, 1), Direction.SOUTH);
+		scene.idle(10);
+		scene.world.showSection(util.select.position(2, 2, 2), Direction.DOWN);
+		scene.idle(10);
+		scene.world.cycleBlockProperty(util.grid.at(2, 1, 2), BeltBlock.CASING);
+
+		scene.overlay.showText(60)
+			.attachKeyFrame()
+			.pointAt(util.vector.blockSurface(util.grid.at(2, 2, 2), Direction.NORTH))
+			.placeNearTarget()
+			.text("Whenever an Andesite Tunnel has connections to the sides...");
+		scene.idle(70);
+
+		scene.overlay.showControls(new InputWindowElement(util.vector.topOf(util.grid.at(4, 1, 2)), Pointing.DOWN)
+			.withItem(AllItems.COPPER_INGOT.asStack()), 20);
+		scene.idle(7);
+		scene.world.createItemOnBelt(util.grid.at(4, 1, 2), Direction.UP, AllItems.COPPER_INGOT.asStack(64));
+		scene.idle(40);
+		scene.world.multiplyKineticSpeed(util.select.everywhere(), 1 / 16f);
+		scene.overlay.showText(80)
+			.attachKeyFrame()
+			.text("...they will split exactly one item off of any passing stacks")
+			.pointAt(util.vector.blockSurface(util.grid.at(2, 1, 0), Direction.WEST))
+			.placeNearTarget();
+		scene.idle(90);
+		scene.overlay.showText(80)
+			.text("The remainder will continue on its path")
+			.pointAt(util.vector.blockSurface(util.grid.at(0, 1, 2), Direction.UP))
+			.placeNearTarget();
+		scene.idle(90);
+		scene.world.multiplyKineticSpeed(util.select.everywhere(), 16f);
+	}
+
+	public static void brass(SceneBuilder scene, SceneBuildingUtil util) {
+		scene.title("brass_tunnel", "Using Brass Tunnels");
+		scene.configureBasePlate(1, 0, 5);
+		scene.world.cycleBlockProperty(util.grid.at(3, 1, 2), BeltBlock.CASING);
+
+		scene.world.showSection(util.select.layer(0), Direction.UP);
+		scene.idle(5);
+		scene.world.showSection(util.select.fromTo(5, 1, 5, 5, 1, 3), Direction.DOWN);
+		scene.idle(5);
+		scene.world.showSection(util.select.fromTo(5, 1, 2, 1, 1, 2), Direction.SOUTH);
+		scene.idle(10);
+
+		Vector<ElementLink<WorldSectionElement>> tunnels = new Vector<>(3);
+		for (int i = 0; i < 3; i++) {
+			tunnels.add(scene.world.showIndependentSection(util.select.position(2 + i, 2, 4), Direction.DOWN));
+			scene.world.moveSection(tunnels.get(i), util.vector.of(0, 0, -2), 0);
+			scene.idle(4);
+		}
+
+		for (int i = 0; i < 3; i++) {
+			scene.world.cycleBlockProperty(util.grid.at(2 + i, 1, 2), BeltBlock.CASING);
+			scene.world.modifyTileNBT(util.select.position(2 + i, 1, 2), BeltTileEntity.class,
+				nbt -> NBTHelper.writeEnum(nbt, "Casing", BeltTileEntity.CasingType.BRASS), true);
+			scene.idle(4);
+		}
+
+		scene.overlay.showText(60)
+			.attachKeyFrame()
+			.pointAt(util.vector.topOf(util.grid.at(2, 2, 2)))
+			.placeNearTarget()
+			.text("Brass Tunnels can be used to cover up your belts");
+		scene.idle(70);
+
+		for (int i = 0; i < 3; i++) {
+			scene.world.cycleBlockProperty(util.grid.at(2 + i, 1, 2), BeltBlock.CASING);
+			scene.world.hideIndependentSection(tunnels.get(i), Direction.UP);
+			scene.idle(4);
+		}
+		scene.idle(10);
+		scene.world.showSection(util.select.fromTo(3, 1, 0, 1, 1, 1), Direction.SOUTH);
+		scene.idle(10);
+		scene.world.showSection(util.select.position(3, 2, 2), Direction.DOWN);
+		scene.idle(10);
+		scene.world.cycleBlockProperty(util.grid.at(3, 1, 2), BeltBlock.CASING);
+		scene.idle(10);
+
+		BlockPos tunnelPos = util.grid.at(3, 2, 2);
+		for (Direction d : Iterate.horizontalDirections) {
+			if (d == Direction.SOUTH)
+				continue;
+			Vec3d filter = getTunnelFilterVec(tunnelPos, d);
+			scene.overlay.showFilterSlotInput(filter, 40);
+			scene.idle(3);
+		}
+
+		scene.overlay.showText(60)
+			.attachKeyFrame()
+			.pointAt(getTunnelFilterVec(tunnelPos, Direction.WEST))
+			.placeNearTarget()
+			.text("Brass Tunnels have filter slots on each open side");
+		scene.idle(70);
+
+		scene.rotateCameraY(70);
+
+		scene.idle(20);
+		Vec3d tunnelFilterVec = getTunnelFilterVec(tunnelPos, Direction.EAST);
+		scene.overlay.showFilterSlotInput(tunnelFilterVec, 40);
+		scene.overlay.showText(60)
+			.attachKeyFrame()
+			.pointAt(tunnelFilterVec)
+			.placeNearTarget()
+			.text("Filters on inbound connections simply block non-matching items");
+		ItemStack copper = AllItems.COPPER_INGOT.asStack();
+		Class<BrassTunnelTileEntity> tunnelClass = BrassTunnelTileEntity.class;
+		scene.world.modifyTileEntity(tunnelPos, tunnelClass, te -> te.getBehaviour(SidedFilteringBehaviour.TYPE)
+			.setFilter(Direction.EAST, copper));
+		scene.overlay.showControls(new InputWindowElement(tunnelFilterVec, Pointing.DOWN).withItem(copper), 30);
+		ItemStack zinc = AllItems.ZINC_INGOT.asStack();
+		scene.world.createItemOnBelt(util.grid.at(5, 1, 2), Direction.EAST, zinc);
+		scene.idle(70);
+		scene.world.multiplyKineticSpeed(util.select.everywhere(), -2);
+		scene.idle(20);
+		scene.rotateCameraY(-70);
+		scene.world.multiplyKineticSpeed(util.select.everywhere(), -.5f);
+		scene.idle(20);
+		scene.world.modifyTileEntity(tunnelPos, tunnelClass, te -> te.getBehaviour(SidedFilteringBehaviour.TYPE)
+			.setFilter(Direction.EAST, ItemStack.EMPTY));
+
+		tunnelFilterVec = getTunnelFilterVec(tunnelPos, Direction.NORTH);
+		scene.overlay.showFilterSlotInput(tunnelFilterVec, 40);
+		tunnelFilterVec = getTunnelFilterVec(tunnelPos, Direction.WEST);
+		scene.overlay.showFilterSlotInput(tunnelFilterVec, 40);
+		scene.overlay.showText(60)
+			.attachKeyFrame()
+			.pointAt(tunnelFilterVec)
+			.placeNearTarget()
+			.text("Filters on outbound connections can be used to sort items by type");
+		scene.idle(70);
+
+		scene.overlay.showControls(new InputWindowElement(tunnelFilterVec, Pointing.LEFT).withItem(copper), 30);
+		scene.world.modifyTileEntity(tunnelPos, tunnelClass, te -> te.getBehaviour(SidedFilteringBehaviour.TYPE)
+			.setFilter(Direction.WEST, copper));
+		scene.idle(4);
+		tunnelFilterVec = getTunnelFilterVec(tunnelPos, Direction.NORTH);
+		scene.overlay.showControls(new InputWindowElement(tunnelFilterVec, Pointing.RIGHT).withItem(zinc), 30);
+		scene.world.modifyTileEntity(tunnelPos, tunnelClass, te -> te.getBehaviour(SidedFilteringBehaviour.TYPE)
+			.setFilter(Direction.NORTH, zinc));
+
+		scene.world.multiplyKineticSpeed(util.select.everywhere(), 1.5f);
+		for (int i = 0; i < 6; i++) {
+			scene.world.createItemOnBelt(util.grid.at(5, 1, 2), Direction.EAST, i % 2 == 0 ? zinc : copper);
+			scene.idle(12);
+		}
+
+		scene.idle(30);
+		scene.world.modifyTileEntity(tunnelPos, tunnelClass, te -> te.getBehaviour(SidedFilteringBehaviour.TYPE)
+			.setFilter(Direction.NORTH, ItemStack.EMPTY));
+		scene.world.modifyTileEntity(tunnelPos, tunnelClass, te -> te.getBehaviour(SidedFilteringBehaviour.TYPE)
+			.setFilter(Direction.WEST, ItemStack.EMPTY));
+		scene.idle(10);
+
+		Vec3d tunnelTop = util.vector.topOf(tunnelPos);
+		scene.overlay.showControls(new InputWindowElement(tunnelTop, Pointing.DOWN).scroll()
+			.withWrench(), 80);
+		scene.idle(7);
+		scene.overlay.showCenteredScrollInput(tunnelPos, Direction.UP, 120);
+		scene.overlay.showText(120)
+			.attachKeyFrame()
+			.pointAt(tunnelTop)
+			.placeNearTarget()
+			.text(
+				"Whenever a passing item has multiple valid exits, the distribution mode will decide how to handle it");
+		for (int i = 0; i < 3; i++) {
+			scene.idle(40);
+			scene.world.createItemOnBelt(util.grid.at(5, 1, 2), Direction.EAST, AllItems.BRASS_INGOT.asStack(63));
+		}
+		scene.idle(30);
+
+		scene.world.hideSection(util.select.position(3, 2, 2), Direction.UP);
+		scene.idle(5);
+		scene.world.hideSection(util.select.fromTo(5, 1, 2, 1, 1, 0), Direction.UP);
+		scene.idle(15);
+
+		ElementLink<WorldSectionElement> newBelt =
+			scene.world.showIndependentSection(util.select.fromTo(3, 3, 2, 0, 3, 4)
+				.add(util.select.fromTo(5, 3, 3, 4, 3, 3)), Direction.DOWN);
+		scene.world.moveSection(newBelt, util.vector.of(0, -2, -1), 0);
+		scene.idle(15);
+		for (int i = 0; i < 3; i++) {
+			scene.idle(4);
+			scene.world.showSectionAndMerge(util.select.position(3, 4, 2 + i), Direction.DOWN, newBelt);
+		}
+
+		scene.overlay.showSelectionWithText(util.select.fromTo(3, 1, 1, 3, 2, 3), 80)
+			.attachKeyFrame()
+			.placeNearTarget()
+			.text("Brass Tunnels on parallel belts will form a group");
+		scene.idle(90);
+
+		ItemStack item1 = new ItemStack(Items.CARROT);
+		ItemStack item2 = new ItemStack(Items.field_226638_pX_);
+		ItemStack item3 = new ItemStack(Items.SWEET_BERRIES);
+
+		tunnelFilterVec = getTunnelFilterVec(tunnelPos, Direction.WEST);
+		BlockPos newTunnelPos = tunnelPos.up(2)
+			.south();
+		scene.overlay
+			.showControls(new InputWindowElement(tunnelFilterVec.add(0, 0, -1), Pointing.RIGHT).withItem(item1), 20);
+		scene.world.modifyTileEntity(newTunnelPos.north(), tunnelClass,
+			te -> te.getBehaviour(SidedFilteringBehaviour.TYPE)
+				.setFilter(Direction.WEST, item1));
+		scene.idle(4);
+		scene.overlay.showControls(new InputWindowElement(tunnelFilterVec, Pointing.DOWN).withItem(item2), 20);
+		scene.world.modifyTileEntity(newTunnelPos, tunnelClass, te -> te.getBehaviour(SidedFilteringBehaviour.TYPE)
+			.setFilter(Direction.WEST, item2));
+		scene.idle(4);
+		scene.overlay.showControls(new InputWindowElement(tunnelFilterVec.add(0, 0, 1), Pointing.LEFT).withItem(item3),
+			20);
+		scene.world.modifyTileEntity(newTunnelPos.south(), tunnelClass,
+			te -> te.getBehaviour(SidedFilteringBehaviour.TYPE)
+				.setFilter(Direction.WEST, item3));
+		scene.idle(30);
+
+		scene.overlay.showText(80)
+			.pointAt(tunnelTop)
+			.placeNearTarget()
+			.text("Incoming Items will now be distributed across all connected exits");
+		scene.idle(90);
+
+		BlockPos beltPos = util.grid.at(5, 3, 3);
+		Vec3d m = util.vector.of(0, 0.1, 0);
+		Vec3d spawn = util.vector.centerOf(util.grid.at(5, 3, 2));
+		scene.world.createItemEntity(spawn, m, item1);
+		scene.idle(12);
+		scene.world.createItemOnBelt(beltPos, Direction.UP, item1);
+		scene.world.modifyEntities(ItemEntity.class, Entity::remove);
+		scene.world.createItemEntity(spawn, m, item2);
+		scene.idle(12);
+		scene.world.createItemOnBelt(beltPos, Direction.UP, item2);
+		scene.world.modifyEntities(ItemEntity.class, Entity::remove);
+		scene.world.createItemEntity(spawn, m, item3);
+		scene.idle(12);
+		scene.world.createItemOnBelt(beltPos, Direction.UP, item3);
+		scene.world.modifyEntities(ItemEntity.class, Entity::remove);
+		scene.idle(50);
+
+		scene.world.showSectionAndMerge(util.select.position(3, 5, 2), Direction.DOWN, newBelt);
+
+		scene.overlay.showText(80)
+			.pointAt(util.vector.blockSurface(tunnelPos.up()
+				.north(), Direction.WEST))
+			.placeNearTarget()
+			.text("For this, items can also be inserted into the Tunnel block directly");
+		scene.idle(20);
+
+		beltPos = util.grid.at(3, 3, 3);
+		spawn = util.vector.centerOf(util.grid.at(3, 5, 1));
+		scene.world.createItemEntity(spawn, m, item1);
+		scene.idle(12);
+		scene.world.createItemOnBelt(beltPos, Direction.EAST, item1);
+		scene.world.modifyEntities(ItemEntity.class, Entity::remove);
+		scene.world.createItemEntity(spawn, m, item2);
+		scene.idle(12);
+		scene.world.createItemOnBelt(beltPos, Direction.EAST, item2);
+		scene.world.modifyEntities(ItemEntity.class, Entity::remove);
+		scene.world.createItemEntity(spawn, m, item3);
+		scene.idle(12);
+		scene.world.createItemOnBelt(beltPos, Direction.EAST, item3);
+		scene.world.modifyEntities(ItemEntity.class, Entity::remove);
+		scene.idle(30);
+
+	}
+
+	protected static Vec3d getTunnelFilterVec(BlockPos pos, Direction d) {
+		return VecHelper.getCenterOf(pos)
+			.add(new Vec3d(d.getDirectionVec()).scale(.5))
+			.add(0, 0.3, 0);
+	}
+
+	public static void brassModes(SceneBuilder scene, SceneBuildingUtil util) {
+		scene.title("brass_tunnel_modes", "Distribution Modes of the Brass Tunnel");
+		scene.configureBasePlate(0, 1, 5);
+		BlockState barrier = Blocks.BARRIER.getDefaultState();
+		scene.world.setBlock(util.grid.at(1, 1, 0), barrier, false);
+		scene.world.showSection(util.select.layer(0), Direction.UP);
+		scene.idle(5);
+		scene.world.showSection(util.select.fromTo(1, 1, 1, 5, 1, 5)
+			.add(util.select.fromTo(3, 2, 5, 1, 2, 5)), Direction.DOWN);
+		scene.idle(10);
+		for (int i = 0; i < 3; i++) {
+			scene.world.showSection(util.select.position(3 - i, 2, 3), Direction.DOWN);
+			scene.idle(4);
+		}
+
+		Vec3d tunnelTop = util.vector.topOf(util.grid.at(2, 2, 3));
+		scene.overlay.showControls(new InputWindowElement(tunnelTop, Pointing.DOWN).scroll()
+			.withWrench(), 80);
+		scene.idle(7);
+		scene.overlay.showCenteredScrollInput(util.grid.at(2, 2, 3), Direction.UP, 120);
+		scene.overlay.showText(120)
+			.attachKeyFrame()
+			.pointAt(tunnelTop)
+			.placeNearTarget()
+			.text("Using a Wrench, the distribution behaviour of Brass Tunnels can be configured");
+		scene.idle(130);
+
+		Class<BrassTunnelTileEntity> tunnelClass = BrassTunnelTileEntity.class;
+		ElementLink<WorldSectionElement> blockage =
+			scene.world.showIndependentSection(util.select.position(4, 1, 0), Direction.UP);
+		scene.world.moveSection(blockage, util.vector.of(-3, 0, 0), 0);
+
+		Vec3d modeVec = util.vector.of(4, 2.5, 3);
+		scene.overlay.showControls(new InputWindowElement(modeVec, Pointing.RIGHT).showing(AllIcons.I_TUNNEL_SPLIT),
+			140);
+
+		ElementLink<WorldSectionElement> blockage2 = null;
+
+		for (int i = 0; i < 32; i++) {
+			if (i < 30)
+				scene.world.createItemOnBelt(util.grid.at(1, 1, 5), Direction.EAST, new ItemStack(Items.SNOWBALL, 12));
+			scene.idle(i > 8 ? 30 : 40);
+
+			if (i == 0) {
+				scene.overlay.showText(80)
+					.attachKeyFrame()
+					.pointAt(tunnelTop)
+					.placeNearTarget()
+					.text("'Split' will attempt to distribute the stack evenly between available outputs");
+			}
+
+			if (i == 2) {
+				scene.overlay.showText(60)
+					.text("If an output is unable to take more items, it will be skipped")
+					.pointAt(util.vector.blockSurface(util.grid.at(1, 1, 2), Direction.UP))
+					.placeNearTarget()
+					.colored(PonderPalette.GREEN);
+			}
+
+			if (i == 4) {
+				scene.overlay.showControls(
+					new InputWindowElement(modeVec, Pointing.RIGHT).showing(AllIcons.I_TUNNEL_FORCED_SPLIT), 140);
+				scene.world.modifyTileEntity(util.grid.at(1, 2, 3), tunnelClass,
+					te -> te.getBehaviour(ScrollOptionBehaviour.TYPE)
+						.setValue(BrassTunnelTileEntity.SelectionMode.FORCED_SPLIT.ordinal()));
+			}
+
+			if (i == 5) {
+				scene.overlay.showText(80)
+					.attachKeyFrame()
+					.text("'Forced Split' will never skip outputs, and instead wait until they are free")
+					.pointAt(util.vector.blockSurface(util.grid.at(1, 1, 2), Direction.UP))
+					.placeNearTarget()
+					.colored(PonderPalette.RED);
+				scene.idle(60);
+				scene.world.moveSection(blockage, util.vector.of(-1, 0, 0), 10);
+				scene.world.setBlock(util.grid.at(1, 1, 0), Blocks.AIR.getDefaultState(), false);
+				scene.world.multiplyKineticSpeed(util.select.everywhere(), 1.5f);
+			}
+
+			if (i == 7) {
+				scene.world.modifyTileEntity(util.grid.at(1, 2, 3), tunnelClass,
+					te -> te.getBehaviour(ScrollOptionBehaviour.TYPE)
+						.setValue(BrassTunnelTileEntity.SelectionMode.ROUND_ROBIN.ordinal()));
+				scene.overlay.showControls(
+					new InputWindowElement(modeVec, Pointing.RIGHT).showing(AllIcons.I_TUNNEL_ROUND_ROBIN), 140);
+				scene.overlay.showText(80)
+					.attachKeyFrame()
+					.pointAt(tunnelTop)
+					.placeNearTarget()
+					.text("'Round Robin' keeps stacks whole, and cycles through outputs iteratively");
+			}
+
+			if (i == 7) {
+				scene.world.moveSection(blockage, util.vector.of(1, 0, 0), 10);
+				scene.world.setBlock(util.grid.at(1, 1, 0), barrier, false);
+			}
+
+			if (i == 13) {
+				scene.overlay.showText(60)
+					.text("Once Again, if an output is unable to take more items, it will be skipped")
+					.placeNearTarget()
+					.pointAt(util.vector.blockSurface(util.grid.at(1, 1, 2), Direction.UP))
+					.colored(PonderPalette.GREEN);
+			}
+
+			if (i == 15) {
+				scene.overlay.showControls(
+					new InputWindowElement(modeVec, Pointing.RIGHT).showing(AllIcons.I_TUNNEL_FORCED_ROUND_ROBIN), 140);
+				scene.world.modifyTileEntity(util.grid.at(1, 2, 3), tunnelClass,
+					te -> te.getBehaviour(ScrollOptionBehaviour.TYPE)
+						.setValue(BrassTunnelTileEntity.SelectionMode.FORCED_ROUND_ROBIN.ordinal()));
+			}
+
+			if (i == 16) {
+				scene.overlay.showText(50)
+					.attachKeyFrame()
+					.placeNearTarget()
+					.text("'Forced Round Robin' never skips outputs")
+					.pointAt(util.vector.blockSurface(util.grid.at(1, 1, 2), Direction.UP))
+					.colored(PonderPalette.RED);
+				scene.idle(30);
+				scene.world.moveSection(blockage, util.vector.of(-1, 0, 0), 10);
+				scene.world.setBlock(util.grid.at(1, 1, 0), Blocks.AIR.getDefaultState(), false);
+			}
+
+			if (i == 19) {
+				scene.overlay.showControls(
+					new InputWindowElement(modeVec, Pointing.RIGHT).showing(AllIcons.I_TUNNEL_PREFER_NEAREST), 140);
+				scene.world.modifyTileEntity(util.grid.at(1, 2, 3), tunnelClass,
+					te -> te.getBehaviour(ScrollOptionBehaviour.TYPE)
+						.setValue(BrassTunnelTileEntity.SelectionMode.PREFER_NEAREST.ordinal()));
+				scene.world.moveSection(blockage, util.vector.of(1, 0, 0), 10);
+				scene.world.setBlock(util.grid.at(1, 1, 0), barrier, false);
+				scene.overlay.showText(70)
+					.attachKeyFrame()
+					.text("'Prefer Nearest' prioritizes the outputs closest to the items' input location")
+					.pointAt(util.vector.blockSurface(util.grid.at(1, 1, 2), Direction.UP))
+					.placeNearTarget()
+					.colored(PonderPalette.GREEN);
+			}
+
+			if (i == 21) {
+				scene.world.setBlock(util.grid.at(2, 1, 0), Blocks.BARRIER.getDefaultState(), false);
+				blockage2 = scene.world.showIndependentSection(util.select.position(4, 1, 0), Direction.UP);
+				scene.world.moveSection(blockage2, util.vector.of(-2, 0, 0), 0);
+			}
+
+			if (i == 25) {
+				scene.world.hideIndependentSection(blockage, Direction.DOWN);
+				scene.world.setBlock(util.grid.at(1, 1, 0), Blocks.AIR.getDefaultState(), false);
+				scene.world.hideIndependentSection(blockage2, Direction.DOWN);
+				scene.world.setBlock(util.grid.at(2, 1, 0), Blocks.AIR.getDefaultState(), false);
+			}
+
+			if (i == 26) {
+				scene.overlay.showControls(
+					new InputWindowElement(modeVec, Pointing.RIGHT).showing(AllIcons.I_TUNNEL_RANDOMIZE), 140);
+				scene.world.modifyTileEntity(util.grid.at(1, 2, 3), tunnelClass,
+					te -> te.getBehaviour(ScrollOptionBehaviour.TYPE)
+						.setValue(BrassTunnelTileEntity.SelectionMode.RANDOMIZE.ordinal()));
+			}
+
+			if (i == 27) {
+				scene.overlay.showText(70)
+					.attachKeyFrame()
+					.text("'Randomize' will distribute whole stacks to randomly picked outputs")
+					.pointAt(tunnelTop)
+					.placeNearTarget();
+			}
+		}
+
+		scene.world.hideSection(util.select.fromTo(3, 2, 5, 1, 2, 5), Direction.UP);
+		scene.idle(10);
+		scene.overlay
+			.showControls(new InputWindowElement(modeVec, Pointing.RIGHT).showing(AllIcons.I_TUNNEL_SYNCHRONIZE), 140);
+		scene.world.modifyTileEntity(util.grid.at(1, 2, 3), tunnelClass,
+			te -> te.getBehaviour(ScrollOptionBehaviour.TYPE)
+				.setValue(BrassTunnelTileEntity.SelectionMode.SYNCHRONIZE.ordinal()));
+		scene.idle(30);
+		scene.overlay.showText(70)
+			.attachKeyFrame()
+			.text("'Synchronize Inputs' is a unique setting for Brass Tunnels")
+			.pointAt(tunnelTop)
+			.placeNearTarget();
+
+		ItemStack item1 = new ItemStack(Items.CARROT);
+		ItemStack item2 = new ItemStack(Items.field_226638_pX_);
+		ItemStack item3 = AllItems.POLISHED_ROSE_QUARTZ.asStack();
+
+		scene.world.createItemOnBelt(util.grid.at(3, 1, 4), Direction.UP, item1);
+		scene.world.createItemOnBelt(util.grid.at(2, 1, 4), Direction.UP, item2);
+		scene.world.createItemOnBelt(util.grid.at(3, 1, 5), Direction.SOUTH, item1);
+		scene.world.createItemOnBelt(util.grid.at(2, 1, 5), Direction.SOUTH, item2);
+
+		scene.idle(80);
+		scene.world.createItemOnBelt(util.grid.at(2, 1, 5), Direction.SOUTH, item2);
+		scene.rotateCameraY(-90);
+		scene.idle(20);
+		scene.world.multiplyKineticSpeed(util.select.everywhere(), .5f);
+
+		scene.overlay.showText(70)
+			.text("Items are only allowed past if every tunnel in the group has one waiting")
+			.pointAt(util.vector.blockSurface(util.grid.at(2, 1, 4), Direction.UP))
+			.placeNearTarget()
+			.colored(PonderPalette.OUTPUT);
+		scene.idle(60);
+		scene.world.createItemOnBelt(util.grid.at(1, 1, 5), Direction.SOUTH, item3);
+		scene.idle(90);
+		scene.rotateCameraY(90);
+
+		scene.overlay.showText(100)
+			.text("This ensures that all affected belts supply items at the same rate")
+			.pointAt(util.vector.blockSurface(util.grid.at(1, 2, 3), Direction.WEST))
+			.placeNearTarget()
+			.colored(PonderPalette.GREEN);
+	}
+
+}

src/main/java/com/simibubi/create/foundation/ponder/elements/InputWindowElement.java

@@ -57,6 +57,11 @@ public class InputWindowElement extends AnimatedOverlayElement {
 		icon = AllIcons.I_RMB;
 		return this;
 	}
+	
+	public InputWindowElement showing(AllIcons icon) {
+		this.icon = icon;
+		return this;
+	}
 
 	public InputWindowElement leftClick() {
 		icon = AllIcons.I_LMB;