Create separate Alpha Pass in Maya Arnold

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In this video, I show you how to create Separate Alpha Pass in Arnold (Maya).
This could come in handy when you have already rendered the beauty pass in a format that does not include an alpha channel. and you'd like to save time by only rendering the alpha channel as separate file for compositing later.
I'd like to thank Eni Kuksi, who shared this trick with me.
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Thanks, Man 2023 and this is still a problem. Thanks for the video it helped me alot

Riaan
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Rápido y conciso, como a mí me gustan los tutoriales. Mil gracias!!!

martinaferrarybohorquez
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Hi man I have a question if I'm using an img sequence in the camera the alpha is complete white, how can i solve this?

RorrixPirrorrix
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Hi thanks for the tutorial! Unfortunately this isn't work for glass/transparent objects for me, as glass objects still appear opaque. I'm using CPU to render (I know that Arnold GPU doesn't support transmissive materials for some reason), I've checked the box for "Transmit AOVs" in my shader, and made sure both Camera and Transmission are at 0 for my skydome. Please help?

AndyMcGinnis
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Wow man, I've been looking for this funcion!
There should be an alpha AOV in Maya to beging with, not all this hussle to make it your self.

albertakesson
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Hey I'm getting white board around object if I'm trying to render render only object and turning off hdri decreasing camera value

shubhams
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Hello, how i can place shadow that the object project and object in two different files? to make a good composition at photoshop using Arnorld render Maya2019

Gndae
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Why doesnt it work in After Effects? When I try to alpha a sequence, alpha is not working and I cant get the transparency to export as png.

Kno_
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I tried doing the animation rendering, with alpha leaving my character white and the background is transparent. How am I going to make the character have color?

yasminesantos