So i got some tilesets online, I converted them all to BMP. But the only problem was, the background was blue, i noticed that the backgrounds on the tilesets that came with Eclipse were purple, so I changed the background to that same exact purple color. I tried to apply them into my game and the purple was visible. So there is this gross ugly purple around my object that should be a transparent background. How can i make it so the purple goes away?