Hello!
I've got a shadowmap which range from 0-1 per fragment. If I multiply that shadowmap with my existing light model I get nice shadows, but the shadowed pixels become darker than the ambient... not good. I've asked google on this topic but haven't been able to get a good answer. How do I get ambient shadows?
my fragment program looks like this, sort of...
// Get shadow value to "red" component
vec4 shadowShade.r=shadow2D(shadowMap, shadowUV.xyz + vec3( 0, 0, 0)).r;
// Copy value to green, blue and set alpha
shadowShade.g=shadowShade.b=shadowShade.r;
shadowShade.a=1.0;
// Calculate attenuation
att = 1.0 / (gl_LightSource[0].constantAttenuation +
gl_LightSource[0].linearAttenuation * dist +
gl_LightSource[0].quadraticAttenuation * dist * dist);
// Put it all together
color += att * (texture2D(tex,gl_TexCoord[0].st) * NdotL)+ambient;
color *= shadowShade;
// Calculate specular value
halfV = normalize(halfVector);
NdotHV = max(dot(n,halfV),0.0);
color += att * (gl_FrontMaterial.specular*shadowShade) * (gl_LightSource[0].specular*shadowShade) * pow(NdotHV,gl_FrontMaterial.shininess);
gl_FragColor = color;
Easier to illustrate the problem with a picture
Thanks in advance!
