“Use legacy color spread – If enabled, the color spread will be computed as in the older versions (prior Chaos Corona version 10). However, in that case “quality” parameter will not only affect the noise but also the look of ambient occlusion. If set to false, the color spread is less prominent, but the look of ambient occlusion does not change with the “quality” parameter.”
https://docs.chaos.com/display/CRMAX/Corona+AO+Map
“Modified how color spread is computed in CoronaAO map to avoid different results when changing sample count. Sample count was also renamed (and remapped) to Quality”
https://blog.corona-renderer.com/chaos-corona-10-released
“Modified how color spread is computed in CoronaAO map to avoid different results when changing sample count. Sample count was also renamed (and remapped) to quality.”
[https://forum.corona-renderer.com/ Chaos Corona 10 for 3ds Max - Daily Builds Changelog #msg211526](https://forum.corona-renderer.com/ Chaos Corona 10 for 3ds Max - Daily Builds Changelog #msg211526)