Shaders Corner IDs of Surface Parts

[GrizzliusMaximus]

I have been using corner ids with sprites and more or less know how to use it. Now I want to get the corner ids of a surface part but I can't seem to find it. Does anybody know how?

 

[sp202]

Does shader_enable_corner_id not work?

 

[GrizzliusMaximus]

It does for sprites but not for surfaces. The lower color bits for surfaces seem to be the same as the actual image_blend color bits and not the "stolen" bits

 

[sp202]

If that's the case then you'll probably have to use a custom vertex format and submit it with the surface as a texture.