hotswapping is more sane now.

src/main/java/com/simibubi/create/events/ClientEvents.java

@@ -25,7 +25,7 @@ import com.simibubi.create.foundation.item.TooltipHelper;
 import com.simibubi.create.foundation.networking.AllPackets;
 import com.simibubi.create.foundation.networking.LeftClickPacket;
 import com.simibubi.create.foundation.render.backend.FastRenderDispatcher;
-import com.simibubi.create.foundation.render.RenderWork;
+import com.simibubi.create.foundation.render.backend.RenderWork;
 import com.simibubi.create.content.contraptions.components.structureMovement.render.ContraptionRenderDispatcher;
 import com.simibubi.create.foundation.renderState.SuperRenderTypeBuffer;
 import com.simibubi.create.foundation.tileEntity.behaviour.edgeInteraction.EdgeInteractionRenderer;

src/main/java/com/simibubi/create/foundation/mixin/RenderHooksMixin.java

@@ -1,6 +1,7 @@
 package com.simibubi.create.foundation.mixin;
 
 import com.mojang.blaze3d.matrix.MatrixStack;
+import com.simibubi.create.CreateClient;
 import com.simibubi.create.content.contraptions.components.structureMovement.render.ContraptionRenderDispatcher;
 import com.simibubi.create.foundation.render.backend.Backend;
 import com.simibubi.create.foundation.render.backend.FastRenderDispatcher;
@@ -8,17 +9,25 @@ import com.simibubi.create.foundation.render.backend.OptifineHandler;
 import net.minecraft.client.renderer.Matrix4f;
 import net.minecraft.client.renderer.RenderType;
 import net.minecraft.client.renderer.WorldRenderer;
+import net.minecraft.client.world.ClientWorld;
+import net.minecraft.tileentity.TileEntity;
 import net.minecraftforge.api.distmarker.Dist;
 import net.minecraftforge.api.distmarker.OnlyIn;
 import org.lwjgl.opengl.GL20;
+import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 
+import java.util.Set;
+
 @OnlyIn(Dist.CLIENT)
 @Mixin(WorldRenderer.class)
-public class RenderInLayerMixin {
+public class RenderHooksMixin {
+
+    @Shadow private ClientWorld world;
 
     /**
      * JUSTIFICATION: This method is called once per layer per frame. It allows us to perform
@@ -43,4 +52,14 @@ public class RenderInLayerMixin {
 
         GL20.glUseProgram(0);
     }
+
+    @Inject(at = @At(value = "TAIL"), method = "loadRenderers")
+    private void refresh(CallbackInfo ci) {
+        CreateClient.kineticRenderer.invalidate();
+        ContraptionRenderDispatcher.invalidateAll();
+        OptifineHandler.refresh();
+        Backend.refresh();
+
+        if (world != null) world.loadedTileEntityList.forEach(CreateClient.kineticRenderer::add);
+    }
 }

src/main/java/com/simibubi/create/foundation/render/backend/BufferedModel.java

@@ -1,6 +1,5 @@
 package com.simibubi.create.foundation.render.backend;
 
-import com.simibubi.create.foundation.render.RenderWork;
 import com.simibubi.create.foundation.render.TemplateBuffer;
 import com.simibubi.create.foundation.render.backend.gl.GlPrimitiveType;
 import com.simibubi.create.foundation.render.backend.gl.attrib.VertexFormat;

src/main/java/com/simibubi/create/foundation/render/backend/FastRenderDispatcher.java

@@ -5,16 +5,10 @@ import com.mojang.blaze3d.systems.RenderSystem;
 import com.simibubi.create.CreateClient;
 import com.simibubi.create.content.contraptions.KineticDebugger;
 import com.simibubi.create.content.schematics.SchematicWorld;
-import com.simibubi.create.content.contraptions.components.structureMovement.render.ContraptionRenderDispatcher;
-import com.simibubi.create.foundation.render.RenderWork;
-import com.simibubi.create.foundation.render.backend.Backend;
-import com.simibubi.create.foundation.render.backend.OptifineHandler;
-import com.simibubi.create.foundation.render.backend.light.ILightListener;
 import com.simibubi.create.foundation.utility.AnimationTickHolder;
 import com.simibubi.create.foundation.utility.WorldAttached;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.entity.player.ClientPlayerEntity;
-import net.minecraft.client.multiplayer.ClientChunkProvider;
 import net.minecraft.client.renderer.GameRenderer;
 import net.minecraft.client.renderer.Matrix4f;
 import net.minecraft.client.renderer.RenderType;
@@ -23,14 +17,8 @@ import net.minecraft.client.world.ClientWorld;
 import net.minecraft.potion.Effects;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.util.math.MathHelper;
-import net.minecraft.util.math.SectionPos;
-import net.minecraft.world.ILightReader;
-import net.minecraft.world.LightType;
 import net.minecraft.world.World;
-import net.minecraft.world.chunk.Chunk;
 import org.lwjgl.opengl.GL11;
-import org.lwjgl.opengl.GL20;
-import org.lwjgl.system.CallbackI;
 
 import javax.annotation.Nullable;
 import java.util.ArrayList;
@@ -93,14 +81,7 @@ public class FastRenderDispatcher {
     }
 
     public static void refresh() {
-        RenderWork.enqueue(() -> {
-            CreateClient.kineticRenderer.invalidate();
-            OptifineHandler.refresh();
-            Backend.refresh();
-            Minecraft.getInstance().worldRenderer.loadRenderers();
-            ClientWorld world = Minecraft.getInstance().world;
-            if (world != null) world.loadedTileEntityList.forEach(CreateClient.kineticRenderer::add);
-        });
+        RenderWork.enqueue(Minecraft.getInstance().worldRenderer::loadRenderers);
     }
 
     private static <T> void runQueue(@Nullable ConcurrentHashMap.KeySetView<T, Boolean> changed, Consumer<T> action) {

src/main/java/com/simibubi/create/foundation/render/backend/RenderWork.java

@@ -1,4 +1,4 @@
-package com.simibubi.create.foundation.render;
+package com.simibubi.create.foundation.render.backend;
 
 import java.util.Queue;
 import java.util.concurrent.ConcurrentLinkedQueue;

src/main/java/com/simibubi/create/foundation/render/backend/light/LightVolume.java

@@ -1,6 +1,6 @@
 package com.simibubi.create.foundation.render.backend.light;
 
-import com.simibubi.create.foundation.render.RenderWork;
+import com.simibubi.create.foundation.render.backend.RenderWork;
 import com.simibubi.create.foundation.render.backend.gl.GlTexture;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.SectionPos;

src/main/resources/create.mixins.json

@@ -3,7 +3,7 @@
     "package": "com.simibubi.create.foundation.mixin",
     "compatibilityLevel": "JAVA_8",
     "refmap": "create.refmap.json",
-    "client": ["OnRemoveTileMixin", "ShaderCloseMixin", "CancelTileEntityRenderMixin", "LightUpdateMixin", "RenderInLayerMixin"],
+    "client": ["OnRemoveTileMixin", "ShaderCloseMixin", "CancelTileEntityRenderMixin", "LightUpdateMixin", "RenderHooksMixin"],
     "injectors": {
         "defaultRequire": 1
     },