Download : Sprite Wizard rnrnhttp://www.bringyourownpaint.com/page.php?id=318&a=dlrnrnUse Alphatest, it is like a .gif, with 255 colors for the picture,rnand the last color in the palette is for transparency. So if the background color of your picture is black, then when you run Sprite wizard, you pick it as the last color, using alpha test, then produce your sprite.rnrnTutorial:rnrnhttp://kman.cottages.polycount.com/sprites.htmlrnrnAnd here is another Tutorial to prepare your picture first in a Photoshop editor.rnrnhttp://www.slackiller.com/DCtuts/DCtuts/tutorialps02.htm