I made this as a test for ground pixel-based lighting. Works best in turbo mode. The lamp1 and lamp2 sliders change intensity. Press 1 or 2 if you can't tell which is which. Key commands: 1 Give lamp one focus 2 Give lamp two focus P Pause (might be an obsolete block) S Snap (causes Lamp II to go to Lamp I - good for showing how the light builds) WASD Move ground blocks one pixel - applies mainly next render Q Make pixel size smaller (or loop around to largest) E Make pixel size larger (or loop around to smallest) H Hide sliders for better view (Thanks to my friend who is always playing with torches on minecraft for inspiration)