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Question by dzeitler2 · May 13, 2019 at 10:09 PM · c#shaderdeformation

Update mesh collider verticies to match shader vertex deformation?

alt text

I looked up this question but it doesn't seem to have a straight answer in terms of what is best for performance.

I created a deformation shader that allows me to "dig" by painting to a lerp mask on the vertex portion of my surface shader. Only issue i'm having is either I find I can put my character at the top of the collision with v.vertex.xyz += v.normal;

or I can put them at the bottom with v.vertex.xyz -= v.normal;

I can't seem to figure out how to get a blend between the two though. which makes me start to think that the mesh collision doesn't match the shader verts being deformed (I guess how could it if the tessellation is only happening on the shader but not the collision so there are no vertex points).

So I assume I need to create a C# script to recalculate these collision verts? Is that expensive and if so is there no possible way to do this all in the shader instead (pardon my ignorance on dealing with colliders).

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