Support ClipPlanes in Materials - Possible error

Hello everyone, sorry but I dont have much time to create a playground so I am going to describe the situation.

In a project that I am currently working on, I have a clipping plane with occasional movement and two meshes that result from a merge mesh operation. After the merge, everything is working correctly and looks normal with a ArcRotateCamera, but if I switch to a FreeCamera, the clipping plane appears to be on a previous position.

Again I am sorry for not being able to provide a playground but just wanted to report the issue. Right now we went back to use 5.32.2 and there is no problem there.

Thank you

This PR will probably fix the problem.

I think the playground will be updated tomorrow and the npm should already be (5.33.1).

Yeahhhh that was me + my big fingers…