spot light, rectangle light functions not affecting fog

Development Rendering
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1

Hello

I see that light function material doesn’t effect the exponential fog .
is there any setting or material maybe that I need to tweak?

thank you in advance
286784-
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2

Play with “Volumetric Scattering” of your light source. Also the Fog needs to have “Volumetric Fog” enabled.

3

I did all of that.
It is shown in the gif file above.
but didn’t change anyting