Troubleshoot Environment Fog problems
 
 
 

You may notice the following problems in environment fog in a rendered image.

Transparent surfaces look incorrect

Set Ambient Shade to 0 for the environment fog light.

Jagged surface edges in environment fog

Do one of the following:

Outlines around 2D motion blurred surfaces

Do one of the following:

Grainy or flickering environment fog

Do one of the following:

Break Connection on Environment Fog does not delete fog

If you have turned on Environment Fog in the Render Settings window, and try to turn it off later using right-mouse button Break Connection, the fog remains.

Do one of the following:

Find the Environment Fog material in Hypershade and delete it.