Why is my Mental Ray Fog so Dark?

[Kirsten Zirngibl]

Hi,

 

I'm finally trying out the "fog" atmosphere effect in Mental Ray and can't figure out why a white fog looks 50% grey in my scene.

 

Light: MR Sun (part of Daylight system)

Environment Map: mr Physical Sky

Atmosphere effect: Fog (regular)

Logarithmic Exposure Control: Active

Fog Parameters:

- Color set to WHITE

No color map or opacity map

"Exponential" box unchecked.

 

Here is a WIP scene:

 

 

Any insights? Thanks.

Edited July 28, 2017 by kirstenzirngibl

[Francisco Penaloza]

Not in my machine now, but if you want to create distant fog with Mental Ray I would recommend to give a try to aerial perspective. This work much better for that type of effect.

Also maybe your problem is the exponential exposure, try to use MRay exposure or photographic exposure instead.

Exponential will clamp brightness and may be creating that effect on your fog.