16bit *.tif output settings - where´s my alpha/backround?

[Tim Leydecker <baueroink(at)gmx.de>]

XSI 6.5 32bit, XP64.

Hi guys,

using a mR physical sky as the environment,
when I output to RGBA *.tif 16bit and open
the file in Photoshop, the alpha channel is
missing and I get semitransparent RGB channels
in the regions the environment shows through.

Now this seems like two problems, one with the
*.tif 16bit RGBA interpreted wrong by Photoshop
(like the initial Photoshop 7 bug with *.tga)
but also with mR_settings the environment should
either have a solid white or black Alpha, right?
(I´d prefer a toggle, so one can comp as desired).

Anyone can repro this or provide a workaround?

I can add a solid black layer beneath my RGB/color
in Photoshop to get solid color channel but still
don´t know wether I might simply have set something
wrong within XSI, like clipping or premult settings?

Cheers

tim


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