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There are many objects in the scene, and multiple lights too. Now, if I do not want a specific object's shadow for a specific light, what should be done?

Note that there are a few answers like this explaining the way to disable all the shadows of an object (then the object casts no shadows at all for any light), but what I want to achieve is disabling shadow of that object only for a specific light.

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2 Answers 2

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The only way is to create a separate render layer where you have a collection with the object ad a collection with all the lamp except the one (and a collection with the other scene object to make a mask).

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  • $\begingroup$ Yes, masking is the only way to go. But maybe you should explain this more in detail because I guess for not so experienced users this isn't so obvious to create from one sentence. $\endgroup$
    – Gordon Brinkmann
    Commented Jun 24, 2021 at 13:33
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Create 2 view layers and two collections.

Then separate the lamps and objects for each collection.

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In compositor you can combine them like this:

enter image description here

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  • $\begingroup$ This won't work with "many objects" and "multiple lights". $\endgroup$
    – Gordon Brinkmann
    Commented Jun 24, 2021 at 13:58

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