Does Crytomatte work in non EXR (32 bit) files?

[hunter_williams]

Tried using the Cryptomatte render element in After Effects using their Cryptomatte plugin and nothing came in.

Does this mean that I can't use it for a PNG sequence?

If this is true, what are my only other options? Multimatte?

I forgot to mention to that I'm trying to mask out different objects in my render sequence.

[hermit.crab]

Cryptomatte is designed for multi-channeled images. Either of the other matte render elements should work for you.

EDIT:
Not saying it won't work - it will as an integer-colored image, however, you won't benefit from the mask selection functionality.

[stezza]

I sometimes save out a Cryptomatte from the frame buffer as png and use that in photoshop. or key out in animation in After Effects as png sequence.

[hunter_williams]

Thanks.

I'm now trying a material wrapper to mask to get the alpha I need.

Any idea of how to get rid of this blackness around my masked layer in AE? I've tried the interpret footage settings (Ignore, Straight, Premultiplied) and no luck.



I rendered out the dome light sky as a separate layer in Maya while making it invisible in the ship render layer.

[hermit.crab]

Was the ship render layer's background black? This usually happens when it's not.

[hunter_williams]

Yeah. I had the dome light marked invisible. So I should render everything and just use a multimatte or Cryptomatte (if doing EXR)?

Edit: I just tried the renderid and Cryptomatte and everything is aliased (jagged) how do I get around that if I want to use these in After Effects?

[hunter_williams]

So I tried Cryptomatte and saved a test image out as an EXR and I can't extract a semi-transparent object (some Phoenix FD smoke).

Any ideas why this is happening?

[hermit.crab]

Yeah. I had the dome light marked invisible. So I should render everything and just use a multimatte or Cryptomatte (if doing EXR)?

Simply adding a VRayCryptomatte, rendering, and saving to a multi-channeled image format should do the trick.

I just tried the renderid and Cryptomatte and everything is aliased (jagged) how do I get around that if I want to use these in After Effects?

There is no antialiasing with the Render ID Render Element.

So I tried Cryptomatte and saved a test image out as an EXR and I can't extract a semi-transparent object (some Phoenix FD smoke).

Are you rendering with V-Ray GPU? Because it's not yet supported. Check all the supported elements here.

[hunter_williams]

I'm rendering with CPU and bucket.

[Morbid Angel]

Thanks.

I'm now trying a material wrapper to mask to get the alpha I need.

Any idea of how to get rid of this blackness around my masked layer in AE? I've tried the interpret footage settings (Ignore, Straight, Premultiplied) and no luck.



I rendered out the dome light sky as a separate layer in Maya while making it invisible in the ship render layer.

The black issue around the object can be many things. Do you mind posting the multi-exr you rendered here so I can take a look, 1 frame is enough. It can be an issue of premultiplciation. If you have an option to unpremultiply the mask in the cryptomatte selector, then try that.

[hunter_williams]

It's because I was rendering out my shot with the Sky Dome set to invisible.

[Alex_M]

I sometimes save out a Cryptomatte from the frame buffer as png and use that in photoshop. or key out in animation in After Effects as png sequence.

How do you save out a Cryptomatte mask as PNG?

[stezza]

Sorry I meant jpg

[Alex_M]

Either way, how do you do this?

[stezza]

To help in photoshop comps I save out from the frame buffer the crytptomatte as jpg
Select cryptomatte in the drop down list in the VFB save as jpg.