Troubleshoot volumetric fog with depth map shadows

User Guide > Rendering and Render Setup > Shading > mental ray for Maya Shading > Advanced mental ray for Maya shading > Atmospheric effects in mental ray for Maya >

If the fog appears with streaks, or the entire effect disappears from your scene when rendering in mental ray for Maya, you can use one of the following solutions.

Solution 1

Use ray traced shadows instead of depth map shadows. See Render raytraced shadows.

Solution 2

In the Attribute Editor for the volume primitive shape node, turn on Volume Samples Override.
Set the Volume Samples value to 5, or greater (between 5 - 20 is recommended). (You may need to tune this setting repeatedly, until you achieve a good result.)
Turn on Depth Jitter.
Render your scene.