Under "Channels" create a new channel...it should be named 'alpha 1'
In the alpha channel, whatever is black will be invisible, grey is semi-transparent, and white will be solid.
Save as png or tga and load into blitz with alpha flag.
In the alpha channel, whatever is black will be invisible, grey is semi-transparent, and white will be solid.
Save as png or tga and load into blitz with alpha flag.