Synthesoft Thanks...

I'd like to thank David Hoskins and Leon Denise for allowing me to include a selection of their shaders with Flashback.  You can see more of their work, including the original versions of the shaders included with Flashback on their respective ShaderToy pages.  

 I'd also like to thank Inigo Quilez for sharing his knowledge of mathematics, computer graphics, and pixel shaders.  If you are interested in learning shader coding, his articles are one of the best resources out there.