Select a visualization mode to help understand how adaptive sampling is working.
0: off
1: Visualize active pixels with heatmap (converged pixels are displayed as is)
2: Visualize sample count heatmap (against current max samples)
3-7: Visualize variance mip levels
Usage
r.PathTracing.AdaptiveSampling.Visualize [value]
Set via the console (~) or in DefaultEngine.ini / DefaultGame.ini.
