Fog issue with TerrainMaterial/MixMaterial

[Tricotou]

Did you have a look at this topic ?

PBR Material weird color with FOG

The result is not the same because: in PBR, the fog color is converted to linear, then the final shader (linear) color is mixed with this linear fog color, then this color is converted to gamma space in standard mode, the fog color is a gamma color and is mixed with the final shader (gamma) color So, in PBR there’s a conversion to linear space before doing the computation, then a conversion to gamma space which yields a different result than doing all the computations in gamma space.

I think best is to use PBR everywhere if you need fog