custom vertex format

Hello,

I'm trying to use a custom vertex format with a secondary UV set.

That's working fine with the fixed function passes. But when I define a new vertex format like this :

Code (csharp):

1. struct v2f {
2.     V2F_POS_FOG;
3.     LIGHTING_COORDS
4.     float2  uv;
5.     float2  uv2;
6.     float3  normal;
7.     float3  lightDir;
8. };
9. struct appdata_base2uvs {
10.     float4 vertex : POSITION;
11.     float3 normal : NORMAL;
12.     float4 texcoord : TEXCOORD0;
13.     float4 texcoordsec : TEXCOORD1;
14. };
15.  
16. v2f vert (appdata_base2uvs v)
17. {
18.     v2f o;
19.     PositionFog( v.vertex, o.pos, o.fog );
20.     o.normal = v.normal;
21.     o.uv = v.texcoord.xy;
22.     o.uv2 = v.texcoordsec.xy;
23.     o.lightDir = ObjSpaceLightDir( v.vertex );
24.     TRANSFER_VERTEX_TO_FRAGMENT(o);
25.     return o;
26. }
27.  

CG complains about the vertex program : Vertex program 'vert': unknown input channel 'texcoordsec'.

I'm pretty sure the vertex program is OK, it simply passes the secondary UV set to the output strcture.

Is it possible that Unity produces shader programs for shadow rendering using the vertex program, and uses a different vertex delcaration that doesn't have a secondary TEXCOORD set ?

 

Thanks a lot, I didn't saw this part of the doc.

(I meant the depth texture filling of the shadow mapping algo. )