Doh, I forgot this was the 2D forum. Yeah, I was talking about 3D. Still, my questions were all valid. You still haven't explained what you want the tweens to look like. After all, to simply move an image from one side of the screen to the other doesn't require any animation; you just increment the position used with DrawImage every frame. If on the other hand you are after a character rotating from facing one way to facing the other then you will need animation. What exactly are you animating?