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Originally Posted by Quib
Well, I guess for a suggestion, I'd recommend coloring everything that's gonna be 100% transparent some horrible color like hot pink and not bother with the alpha channel 'til you're done with the image.
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I considered doing that, the problem is that if you use any of Photoshop's integral anti-aliasing/soft-edge tools you end up with the magenta bleeding into whatever it is you're working with.
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Originally Posted by Quib
I see the wink, but you're just being stubborn. =P In DDS and TGA, there is no such thing as transparency in the RGB channel(s). There's a color at every pixel.
I know it's our personal taste butting heads, but I wish every format used an alpha channel rather than the imprecise mixed-mode style Photoshop's format uses, as well as what? PNG and some other oddball formats? Being able to specify alpha at an accurate value on a per-pixel basis is wonderful.
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Yeah, I am being stubborn. I don't so much mind the alpha channel itself, as I do the fact that you can cnvert a DDS to PNG/PSD/PDD and get the transparency displaying correctly. Modify it using native Photoshop transparency and convert it back and you occasionally end up with weird alpha-channel remnants when the intermediary format doesn't even support alpha channel (well, okay, PSD and PDD do, PNG doesn't) for the glitches to pass across in.
P.S. Tony, you're thinking of GIFs. PNGs and PSDs/PDDs don't require a color definition for transparency that I know of.