Rainbow models sunlight scattered by individual water droplets in waterfall spray. A homogeneous bounded cloud is the baseline. Spectral droplet optics and a CPU particle renderer produce physically interpretable images and configurable parameter sweeps. Workspace: /home/john/py/rainbow.
Development process and contributor guidance
Droplet physics and image formation -> Architecture; experimental controls -> Configuration and Parameters; CPU cores, sockets and worker machines -> Execution. Development status, decisions and validation remain under rainbow/dev.