Objects with transmission not showing objects behind

it’s not possible. but you can use this: MeshTransmissionMaterial: more realistic glas/epoxy/gelatin

it looks a thousand times better, is otherwise based on MPM with the same props, and doesn’t have that problem as it “sees” all. and it’s faster, too.

there is a vanilla material in the post, though, sadly, it reverts back to the problem as it can’t see other transmissive/transparent objects. but the code that makes it support that is very little, you can quickly add it from the react material. it just can’t be a self contained single class no more because it needs some setup.