Increase sample count

libraries/pbrlib/genglsl/lib/mx_pre_convolve_environment.glsl

@@ -124,7 +124,7 @@ vec3 mx_pre_convolve_environment()
  // If we use prefiltering, we can have a smaller sample count, since pre-filtering will reduce
  // the variance of the samples by choosing higher mip levels where necessary. We haven't
  // implemented prefiltering yet, so we use a high sample count.
- int sampleCount = 610; // Must be a Fibonacci number
+ int sampleCount = 1597; // Must be a Fibonacci number
 
  float3 lightInt = float3(0.0, 0.0, 0.0);
  float cbsdfInt = 0.0;