Env Fog Question

[hsz]

Hi what is the best way to speed up the Env Fog for Vray Im rendering 9K I got some light on the scene and that's about it ... the frames are taking 1:20 min a frame which I believe is a little much ...
Thanks

[Svetlozar Draganov]

You may consider:

-decreasing Subdivisions value
-turning OFF Scatter GI, or if you want to use that option then decrease Scatter GI bounces
-increasing Cutoff Threshold value

If you are using 3D texture to control the Environment Fog you may also consider:

-increasing Step Size
-decreasing Texture Samples

Changing all these parameters will also affect the quality of the fog.