Maya render: Targa Transparency Problem

[lazzhar]

Yest it happens all the time. Go to your Render global then uncheck PreMultipy.
For me I render to Tiff then Photoshop will exract the transparency without any problem.

[Andrew W]

The problem is caused by Photoshop's very poor understanding of alpha channels and how to composite using them. lazzhar's Tiff suggestion works because TIFFs are the only format that Photoshop now loads with the transparancy "baked" in. I think Photoshop is unsure about pre-multiplied and unpremulitiplied mattes. If you load your Targa into any other compositing package they should comp fine. Basically Photoshop is not a good compositing package.

Hope that helps.

Andrew

[Dreamy Kid]

thank you very much for the solution ! problem solved :thumbsup:

[Mauritius]

In Photoshop, from the menu select Layer->Matting->Remove Black Matte.

This essentially divides by Alpha, removing a double pre-multiplication Photoshop might have erratically applied to your image on import.

.mm

[lazzhar]

I've played a lot with that Premultiplied Alpha and found a solution by duplicated and inverting layers, but honestly I forget how I did it since I'm rendering to TIFF. But I didnt know about that method mentioned by Mauritius !

PS: Hey !! what are you doing in India man?? !!

[Mauritius]

Working as 'Rendering Supervisor' on some European 3D movie produced in Banaglore with the intention to save money... ;)

.mm

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