I have a program that goes something like:

setup(){
 setup stuff
 loadPixels();
}

draw(){
 updatePixels();
 draw stuff
 loadPixels();
 draw more stuff
}

void mousePressed{
 saveFrame("blah###.png");
}


the point is to have something move around and leave a trail.

the problem is that when saveFrame() is called, it saves the floating thing into the background.

I managed to keep that from happening by loading pixels into another array, then back after saveFrame() has been called, but this slows it down a bunch.

any suggestions?