Projection texture and instances

Bugs
1

Projection textures apply to the base object and NOT to instances. Here is an example:

In line 38
light.includedOnlyMeshes = [box, box3]; the instance (box3) is simply ignored for the texture. To make it work one has to use its original object box3. Then it works even though that one is invisible.

2

You have to use clones, because instances are rendered by same draw call / share material with their original.

While every clone can have an individual material and transformation, but shares geometry.

Your PG with clone:

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