How to chamfer edges with shaders

[IronSuit]

@amoser

The reason this is difficult is that generally, a bevel effect requires access to normals and edges outside of the current pixel which generally can’t be read directly from a material.

That said, since the shape of spheres and cylinders are known in advance, it is possible to make something along these lines, although it doesn’t seem like it would be a great approach.

This isn’t a complete solution, but here’s a quick example of beveling the corners of a cube by constraining vertices to a specific radius (i.e. a sphere). There are some unfortunate limitations to doing it this way, though, such as the fact that tessellation needs to be enabled to allow new vertices/edges to be created.

Is there a reason this needs to happen in a material specifically? This seems like the most roundabout way of achieving this effect.

I really Apperiate you taking your time to answer my question.

why i want to implement the bevel this way is because i have a archvis 3d model that i want my users to be able to change the bevel at runtime.
i thought it would be much more time efficient if i could implement it using this way instead of manually making beveled meshes for my items then morph between them when user wants to bevel