Very cool project. I'm curious, does anyone know how the ray tracing works in this project?

I've never heard of a ray tracer in Python, and am wondering if this is trying to use methods like raymarching with signed distance functions, or if it just takes the hit performance-wise since it looks like there isn't much ray tracing needed to model the performance of the camera lenses.

PyRayT is focused on simulation/analysis of optical systems rather than 3D rendering.

By all means it can be used to render stuff, albeit more slowly than traditional tracers, but it's not the project's focus.