Refinement stop criteria
Multiple criteria are available to define the end of the refinement phase. The rendering will stop as soon as the first limit is reached.
Max samples per pixel: the higher the limit, the better the quality and the longer the rendering time
Max quality: expressed as the rate of convergence per pixel, from 0 to 1, where 1 represents an infinite convergence
Max time: maximum duration of the calculation in hours, minutes and seconds before stopping the refinement
Max path length: in number of bounces