Hi,

I have been trying for ages to reduce the render times of my fog pass. Ive tried everything i can think of and still the render times seem too high. Even at there lowest settings it seems to take too long.

I have tried:

Reducing the sample rates of the light
Changing the render settings e.g. using PBR and micropolygon etc
Changing the volume step size

Everything i have tried has had no real effect on the render times. What can I do to improve the render times? As I am using an area light and fog will this just take a huge amount of time to render (a frame is taking from 9 minutes to about 5 minutes per frame)

Thanks for your time

Phil

try excluding the fog from the ‘shadow mask’ parameter of all of your lights. even dense-ish fog has minimal perceptible self-shadowing. visible shadows in fogs tend to be the shadows cast by hardsurface objects into the fog, which are extremely quick to calculate (no need to march along the shadow ray).

-b