how to get custom shaders to recieve shadows?

wenglish

hello

I am having difficulty finding information on how to use realtime shadows with my shaders. I found that they will cast shadows as long as I include a fallback shader, but they will still not receive them. this also seems to be sparsely documented...

thoughts?

Farfarer

It's well documented in the forums.

Diffuse has a fallback of vertex lit, which contains within it two passes; Shadow Caster and Shadow Receiver. These are the two passes that allow the shader to cast and receive shadows.

To receive shadows in your own custom shader, use the macros/helpers defined for you in AutoLight.cginc...

// Inside CGPROGRAM block.
#include "AutoLight.cginc"

...

// Inside v2f struct.
LIGHTING_COORDS(4,5); // Where 4 and 5 are the next two available texcoords.

// Inside vertex shader, just before return.
TRANSFER_VERTEX_TO_FRAGMENT(o); // Where o is the output variables name.

// Inside fragment shader.
fixed atten = LIGHT_ATTENUATION(i); // Where i is the input variables name.

Here's a full example shader...

http://forum.unity3d.com/threads/198141-Lighting-using-tangent-vector-and-also-using-surface-shaders?p=1344367&viewfull=1#post1344367