bagginsbill posted at 11:16AM Wed, 04 March 2020 - #4382377

AmethystPendant posted at 2:03PM Mon, 02 March 2020 - #4382326

@JohnDoe641 do you output to Exr or Png, interested because of the clamps being set to 0

Thinking about those clamps should not lead to asking about EXR. With or without those clamps the output can exceed LDR 0-255. The clamps apply to the individual samples being accumulated for each pixel, which is an average of hopefully many samples. When you don't use enough samples to really get a good average, then a single "hot" value can easily produce a firefly. So clamping is to give up some lighting accuracy in exchange for fewer firefly artifacts. It has almost nothing to do with HDR output format.

The only reason I asked that was because of a thread back on the old SM forum where we were looking at tone mapping and that was one of the things that was mentioned to get full dynamic range in an image, I now use gimp tone mapping to rebalance some "darker" renders but to get the most out of that I need to export to EXR rather than png/jpg