Good morning, Roy,
A question, please
Added Combine Path Tracings… option to the Image Editor. (See Image→Arithmetic.) This powerful feature allows path tracings of the same scene and resolution to be combined into a single image. This single image will contain the sum of the number of passes of all the images. For example, a 500 pass image can be combined with a 250 pass image to produce a 750 pass image. Path Tracer only.
This may be obvious , or not. Combining a 300 pass .nxtimage with a 500 pass .nxtimage to achive an 800 .nxtimage and then combining the 800 pass with the 500 pass to achive a 1300 pass, etc, etc. Can this be done over and over and realize the same results of a single pass of the total combined passes. Just wondering.
Rich Rosemann