go to 3ds max
click on PLANE where the modifiers normally are, but on the first tab.
set the number of vertices in it's properties
edit them to give it the desired shape, or even make a basic 4 vertices plane and use transparency.
????
profit
i think ill just use 2D models for that... already got my hands on some 2D models anyways... i have an idea tho for the hand USED in the dissidia menu screen..
for brawls, its a red, flashing color border
dissidia - hand icon
if i use brawl's hand model + animation, it'll look very nice... well to the image i have in my head that is xD