XNA `tex2Dlod` always returns transparent black
- by feralin
I want to sample a texture in a vertex shader, so at first I just tried using
float2 texcoords = ...;
color = tex2D(texture, texcoords);
But apparently I cannot use tex2D in a vertex shader, and must use tex2Dlod. So then I changed the above code to
color = tex2Dlod(texture, float4(texcoords, 0, 0));
But now color is always float4(0, 0, 0, 0) (i.e. transparent black).
Why is this, and how can I fix it?
EDIT: I know for a fact that the texture does not contain just transparent black pixels.
