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Posted: 2006-01-25T21:39:14-07:00
by magick
It appears your TARGA images have an inverted alpha channel. According to the TARGA specification, an alpha channel of 0 is fully transparent and 255 is fully opaque. ImageMagick uses the negation of this (0 is fully opaque) so we subtract the TARGA alpha value from 255.

Posted: 2006-01-30T21:03:09-07:00
by magick
Can you post a URL to at least one 16-bit TGA with alpha and one 32-bit TGA with alpha so we can test the ImageMagick TGA support. We see opportunities for fixes in the coder but we need a test image to confirm our patch is working properly.