Filtering Settings
Filters reduce certain artifacts associated with the non-convergence of pixels. Filters can impose an additional calculation load, which can taken up, in part, by the CPU.
Fireflies: filters bright points
Degrain filtering: produces a smoothing of the rendering. Five modes are available:
Pixel clipping
Smart median
Smart average
Limited blur
Limited auto blur
In ascending order, the Pixel clipping produces a soft smoothing while the Limited auto blur produces a strong smoothing.
Note
Modes 4 and 5 of degrain filtering are not physically realistic.