Casting shadows

Unity Engine
1

Is there any requirement on the shader/material level in order for an object to cast (not receive) shadows? I ask because I’ve (unintentionally) managed to create a custom shader that receives shadows fine, but doesn’t cast them, on itself or any other object.

Before you ask, yes, “Cast Shadows” is checked on the associated Mesh Renderer.

2

Technically, some subshader has to have passes of “SHADOWCASTER” and “SHADOWCOLLECTOR” light types.

The easiest way to achieve this is to fallback to VertexLit shader (or some other built-in shader that ultimately falls back to VertexLit).

3

Thanks, Aras!

For assorted reasons I need the shader to fail entirely if it’s not supported, so falling back to VertexLit isn’t optimal. But, that led me to the following, which does exactly what I need:

	UsePass "VertexLit/SHADOWCOLLECTOR"
	UsePass "VertexLit/SHADOWCASTER"