Monotone/ desaturated reflection material in Blender/ Cycles Does anybody know how to get desaturated reflection (monotone) made from colorful object? Blue object, white plane beneath. With standard settings the reflection is blue. I would like to have it black and white. I tried adding HUE/SATURNATION node to diffuse or glossy shader (connected into mix shader) but this doesn't seem to work… I know it's possible with compositing but it's a bit tedious…. Any idea?
You can use the Light Path node in your colored object's material.
Then, the object's reflections will be monochromatic.

Connect the Is Reflection Ray output into the FAC input of a mix shader.