So im doing a painting for a homework project concerning dynamic lighting. I'm supposed to use the circular gradient tool, but when I try to put down more than one gradient, it erases the previous gradient. Same with the paint bucket. If I fill up the background with color, and then try to put down a gradient, it erases the background color and replaces it with the gradient. But when I try to put down multiple gradients in a different image, I have no problems. I have my transparency checked. I need to get the painting done soon so I'm kind of desperate. Any idea's? I'm using photoshop cs5.