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When it comes to PS and TGAs, you have to create alpha masks manually. There's multiple how-tos on YT.
But if your texture is quite tricky, e.g., it has half-transparent areas that are a mix of white-grey-black colours, the most PITA-less solution is to save your image as a PNG file and then convert it to TGA later.
I still dunno why Adobe devs haven't opted for auto-alpha-masking.
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Last edited by lightspark : 10-01-17 at 10:12 PM.
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