Heres a snippet that allows you to make your own images by using a mathematical formula. It gives you fast access to each pixel in the bitmap, and then saves the image as a .bmp once its made. You can be creative like this and make images which would be impossible to make using applications such as photoshop, here are some examples of some I have made using this technique.
The trick to making these, is to just put in the craziest formulas you can think of, you don't even need to know what the output should look like, just experiment, and speed isn't a problem, so it can be as long as you want it :icon_cheesygrin: !
Heres a one more :)
r = static_cast<ubyte>( (cos( sin (px) / py ) * (px + py)) * 127 + 127 ); g = static_cast<ubyte>( cos( (double)r ) * 127 + 127 ); b = static_cast<ubyte>( ~((r + g) / 2) );