I need to isolate filters on some objects in the compositor and Blender 2.8 does not have the options to setup object/material passes in the View Layers. Is there anyway to achieve this in Blender 2.8 and for EEVEE?
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$\begingroup$ Blender 2.8 Cycles has Cryptomatte feature (youtube.com/watch?v=Ml1Kic4VopA) which is more versatile, so you do not need object/material pass index. $\endgroup$ – 3DSinghVFX Nov 2 '18 at 18:10
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1$\begingroup$ @3DSingh This is not my post though :D $\endgroup$ – Amir Nov 2 '18 at 18:12
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3$\begingroup$ I'm voting to close this question as off-topic because it is about unfinished experimental development software. $\endgroup$ – metaphor_set Nov 2 '18 at 18:32
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$\begingroup$ @3DSingh, cryptomatte is only available in cycles render, not Eevee. $\endgroup$ – sotn Nov 2 '18 at 18:48
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$\begingroup$ For beginners seeing this post in future searches, I'll mention that 2.8 pass indices have been added back in as of now. But the whole thing is still of course a WIP and not ready for production. $\endgroup$ – AaronF Jan 21 at 9:40
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In 2.8, Cycles there is something called the cryptomatte node. Unfortunately, at the time of writing this, it is not implemented for Eevee.
I found a solution by creating view layers, then evaluating the depth in both. View layers are like 2.79's render layers, so you can exclude objects from being rendered in each.
Next, I evaluated depth in both view layers. Since one of the view layers is missing the object, you can use a greater than or lesser node to create a mask.
Here's a video on view layers: https://youtu.be/BBuD64KhxeY?t=1502
I imagine 2.8 Eevee will gain cryptomatte in the future.
