Wire color/ID/Clown pass - alpha vegetation

Support Compositing and Post Processing
#1

Hello guys, I have a problem with a clown pass. I know it is not as greatly implemented in blender/cycles as it is in other engines yet and I am aware that there are several workarounds.

Anyway I have a problem to create a clown/ID pass that would take in consideration alpha of a foliage and vegetation in general. Clown pass that I am able to create in blender/cycles doesn’t work on leaves cutout by alpha instead it creates color of a raw mesh (that is not same shape as final alpha cut leaf).

IS there a way to get ID/clown pass that would copy exact shape of a leaf that has alpha on?

#2

Does Cryptomatte not work for you?

#3

What a great question. I would like to know a smart way of doing this myself :slight_smile:

Summary

EDIT: Cryptomatte is the way for me now, thanx to Lumpengnom

Meanwhile what I would do is to make a copy of my project(Save as…). Select all the objects except leaves and assign a blank material to them. For leaves material leave transparent as is and set white emission to the leaf. Oh, and you may also need to set up World material.

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1 Like
#4

I think you could just use an aov pass in the leaves material.

1 Like
#5

I thought cryptomatte would not handle transparency in this case. But it actually do amazing work.
Haven’t tried AOV pass before, but it is also really helpful.
Thank you so much!

#6

Thanks guys, I’ll try that up.

F.