It is possible to separate the reflected background , for example having 2 glossy objects A and B and a hdri image as background to reflect. I want to have a blurred version of the hdri reflected on object A and a crisper version(or diferent hue) reflected on object B. I am aware that using the light path node and substracting glossy and singular ray it is possible to split the reflection one object having the sharp Bsdf , but i need two glossy objects with roughness non zero each . thank you
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Starting with two objects with the same glossy material.
Give the objects different Pass Index.
Enable Object Index in the render layer
In the compsitor use an Id Mask node and select the pass index of your object and use that to mix the blurred image with the non blurred one:
