Clamp lodval

2014-10-24 00:41:34 +02:00
parent b4f95d672a
commit 794ab54b7a
1 changed files with 1 additions and 1 deletions
--- a/data/shaders/diffuseenvmap.frag
+++ b/data/shaders/diffuseenvmap.frag
@@ -52,7 +52,7 @@ void main(void)
    float specval = texture(ntex, uv).z;
    // From http://graphics.cs.williams.edu/papers/EnvMipReport2013/
    int texSize = textureSize(tex, 0).x;
-    float lodval = log2(texSize * sqrt(3)) - .5 * log2(specval + 1);
+    float lodval = clamp(log2(texSize * sqrt(3)) - .5 * log2(specval + 1), 0., 10.);
    vec4 specular = textureLod(tex, sampleDirection, lodval);
    Spec = max(specular, vec4(0.));
 }