Disabling static lighting from emissive lights while using GPU Lightmass

Hello everybody,
I’m trying to do a fake fog that works on mobile (therefore no Mobile HDR so no postproduction effects) and i figured out a nice solution with using a sphere mask that makes the materials in the scene blend with an emissive material with the fog color when far away.
The problem is, I also want to use GPU lightmass baking and it seems like there’s no way to turn off static lighting from emissive materials when using it. The Use Emissive for Static Lighting setting is ignored and I can’t find any other related option.
Is there any workaround?do i have to resign from using GPU lightmass, or is there maybe another way to create a fog without post effects and without emissive materials?
thanks a lot

The lightmass replace node in the material editor might work.

Thanks, doesn’t seem to tho

Can you try the RayTracingSwitch node instead?