I meant that even with black "stuff" at the edge, only few of those things are actually usable because NAC's beams e.g. are pitch black. So it's just as the ones from Raj. =/
And you seriously need to look up "alpha channel"
Well...? NAC's beams can be composited perfectly in normal blending.
In some effects, like glowing the back layers, cannot be satisfied with only alpha channel, it need's special compositing method.
I guess that's why some effects sprites are looking opaque: used in game as special blending layer.
And if you're gonna use opaque effects stuff, doesn't mugen support blending options?
I don't know exactly