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Phong tesselation is not working on a skinned mesh (or any mesh) that has blendshapes. Is that a known limitation or a bug?

I mean of course, that tesselation itself is working but without phong smoothing. Starts working when I remove all blend shapes.

Hey there!

We're not quite sure about this since Amplify Shader Editor uses the Tessellation technique provided by Unity, so we'll have to investigate it.

Have you tried to replicate this issue using Phong Tessellation in Unity's Standard shader to see if the problem still persists?

Sorry, correction: I might have some broken models. I tried to reproduce the issue but with no success. Currently, I can't reexport those models as FBX or import them into some programs. Newly exported models work fine.

I tried Tesselation shaders from the free Alloy package, by the way. Same thing.

I'll let you know if I'll have this issue again. Probably just broken models somehow. Thank you.