How to apply sobel filter to single object?

Questions
1

I specified sobel filter to mesh material,but can’t got it

2

What you are trying to do does not work. Like any post-processing effect you can’t apply a Sobel operator just to a specific mesh in your scene. You have to render the objects which should be affected by post processing separately, then apply the post processing and then additively blend the result to your beauty pass (the result of RenderPass).

3

you can only do things that relate to a single pixel in mesh material. sobel filter requires a knowledge of neighbor pixel values - thus impossible.

4

thanks，i will try it

5

I understand, thanks