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Posted 07 January 2013 - 03:12 AM
~disregard this post - I didn't read the question correctly the first time~
Posted 07 January 2013 - 03:11 AM
I don't think OGL supports color keys, so you may want to either implement a pixel shader for it or else just deal with manually adjusting the alpha values in software.<br /><br />In either case just iterate through each pixel and if r,g, and b are 0 then set alpha to 0 as well.