datavorous/tinytracer

TinyTracer is a Python program that creates photorealistic images by simulating how light bounces around in a 3D scene. Instead of directly drawing objects, it traces the paths that light rays take as they bounce off surfaces, which produces images that look like they were photographed rather than drawn. You run it from the command line, point it at a scene description, and it generates a realistic image file. The core idea is straightforward: for every pixel in your final image, the program shoots virtual light rays into the 3D world and follows where they go. When a ray hits a surface, it calculates how that surface reflects or absorbs the light, then continues tracing. By sending many rays per pixel and averaging the results, the program builds up a realistic picture. The README mentions it currently supports spheres and flat shapes, along with four types of materials, matte surfaces, shiny metals, transparent glass-like materials, and glowing objects. It also uses multiprocessing to speed things up by splitting the work across multiple CPU cores. You'd use this if you're interested in computer graphics, want to experiment with 3D rendering, or are learning how ray tracing works. Someone might run it to generate a custom image for a project, or tweak settings like image resolution, the number of light samples per pixel, or how deep the light rays travel into the scene. The command-line options make it flexible, you can dial up the quality for a beautiful final render or dial it down for a quick preview. The project is deliberately kept small and readable, written in plain Python without heavy dependencies, which makes it a good learning tool. It's actively looking for contributors to add more shapes, new materials, or performance improvements. If you're interested in graphics but intimidated by massive rendering engines, this is a manageable place to start.