Cycles mist pass does not appear in reflection I'm having a problem with reflections of objects in cycles, where the standard mist pass does not seem to be properly reflected. In the image I have uploaded you can see that the mist obscures only the three nearest cubes, but in the horizontal reflective plane many more cubes are visbile going much further back, whereas in reality the visibility should be the same. I've tried switching to volumetric mist but I'm doing a long animation and it takes far longer to render.

here is the setup for the mist pass - very simple and following tutorials
The mist pass is not going to get the results you are looking for. It will only output the distance from your geometry to the camera and won’t respect your shaders’ reflectiveness.  That’s why it renders so much faster than the right way to get this look, the volumetric shader for the world.