Press the green flag to render. Lower resolution means better quality and longer render time. If you change the resolution, press the flag or it will not work. Press R to randomly generate 5 blocks and render them. This can render blocks with any specific scale, position, and color.
The project runs SIGNIFICANTLY faster in Phosphorous. http://phosphorus.github.io/app.html?id=124820376&turbo=true&full-screen=true&scratch.mit.edu This works by sending a particle out. The particle goes forward until it enters a box volume. When it enters, it goes up towards where the sun is. If it hits anything, it draws that pixel black. Otherwise it draws the block's color.
