Arnold Render Selection to Texture with Alpha Mask

[Marla_B]

Hi, new to Maya so hopefully I can communicate this right. I'm using the Arnold 5 Render Selection to Texture utility to bake a texture of a character's face. I need to add an alpha channel to the file which will eventually be used to mask out the character's mouth. I know in Arnold 5 there's an option to Enable AOVs, which I'm sure would offer some solution, but I'm not getting the results I'd like and it seems that for each active AOV it bakes separate files, when I need a single composited file. Any guidance is appreciated.

[dennis.volkerts]

Had the same problem, using the opacity AOV gave me the black and white alpha in a sepperate file which I then could add in some compositing software. Really annoying though.

Also I would like to add the feature to render it on the farm. not just local.