Hm, there must be a world matrix because if it were an identity-matrix,
float3 vec = (mul(float4(In.Pos.xyz, 1), (float4x4)matWorld)).xyz - vecViewPos.xyz;
would be reduced to
float3 vec = In.Pos.xyz - vecViewPos.xyz;
but this doesn't work for me.
On the other hand, I face other problems: when I replace matWorldViewProj in my calculation of Out.Pos with
mul(matWorld, matViewProj)
The sky gets clipped:
This doesn't happen, when I concatenate matWorldView with matProj like this:
mul(matWorldView, matProj)
