message: speedup of volume AO
diff: @@ -191,7 +191,7 @@ float SciVis_computeAO(const uniform SciVis *uniform self,
  ldSampler,
  1.f,
  dg.epsilon,
  - 1.0f));
  + 0.1f));
  }
  // the cosTheta of cosineSampleHemispherePDF and dot(shadingNormal, ao_dir)
  