diff --git a/src/main/java/com/jozufozu/flywheel/backend/InternalVertex.java b/src/main/java/com/jozufozu/flywheel/backend/InternalVertex.java
index 37052a5c9..74bd5cef0 100644
--- a/src/main/java/com/jozufozu/flywheel/backend/InternalVertex.java
+++ b/src/main/java/com/jozufozu/flywheel/backend/InternalVertex.java
@@ -4,7 +4,6 @@ import java.util.List;
 
 import com.jozufozu.flywheel.Flywheel;
 import com.jozufozu.flywheel.api.layout.FloatRepr;
-import com.jozufozu.flywheel.api.layout.IntegerRepr;
 import com.jozufozu.flywheel.api.layout.Layout;
 import com.jozufozu.flywheel.api.layout.LayoutBuilder;
 import com.jozufozu.flywheel.api.vertex.VertexView;
@@ -19,7 +18,7 @@ public final class InternalVertex {
 			.vector("position", FloatRepr.FLOAT, 3)
 			.vector("color", FloatRepr.NORMALIZED_UNSIGNED_BYTE, 4)
 			.vector("tex", FloatRepr.FLOAT, 2)
-			.vector("overlay", IntegerRepr.SHORT, 2)
+			.vector("overlay", FloatRepr.SHORT, 2)
 			.vector("light", FloatRepr.UNSIGNED_SHORT, 2)
 			.vector("normal", FloatRepr.NORMALIZED_BYTE, 3)
 			.build();
diff --git a/src/main/resources/assets/flywheel/flywheel/internal/vertex_input.vert b/src/main/resources/assets/flywheel/flywheel/internal/vertex_input.vert
index 776f12513..d77f66665 100644
--- a/src/main/resources/assets/flywheel/flywheel/internal/vertex_input.vert
+++ b/src/main/resources/assets/flywheel/flywheel/internal/vertex_input.vert
@@ -1,7 +1,7 @@
 in vec3 _flw_a_pos;
 in vec4 _flw_a_color;
 in vec2 _flw_a_texCoord;
-in ivec2 _flw_a_overlay;
+in vec2 _flw_a_overlay;
 in vec2 _flw_a_light;
 in vec3 _flw_a_normal;
 
@@ -9,10 +9,9 @@ void _flw_layoutVertex() {
     flw_vertexPos = vec4(_flw_a_pos, 1.0);
     flw_vertexColor = _flw_a_color;
     flw_vertexTexCoord = _flw_a_texCoord;
-    // Need to clamp the overlay texture coords to sane coordinates because integer vertex attributes explode on
-    // some drivers for some draw calls. This should only effect instances that don't write to overlay, but
-    // the internal vertex format is unfortunately subject to these issues.
-    flw_vertexOverlay = clamp(_flw_a_overlay, 0, 15);
+    // Integer vertex attributes explode on some drivers for some draw calls, so get the driver
+    // to cast the int to a float so we can cast it back to an int and reliably get a sane value.
+    flw_vertexOverlay = ivec2(_flw_a_overlay);
     flw_vertexLight = _flw_a_light / 256.0;
     flw_vertexNormal = _flw_a_normal;
 }