Here is some crazy idea Guys:)
Max Sample Intensity option for Corona material to avoid noise and fireflies for extreme reflective materials in scene only in partial way and speedup rendering process, without changing brightness of reflection's in all scene with
global MSI/
Same option very useful for games with caustic/
For example: Corona light in Lamp's Bulb or inside of reflector in the lamps in scene, to avoid fireflies in all scene from this materials and objects/
maybe I'm wrong or it's impossible.
Thanks:)