How to create a fractal without fractal?
1) Create a spline, extrude it, and assign it a mirror material
2) Add diffuse floor
3) Shine very difrectional light into it!
The light will bounce off the curved walls, getting more and more scattered, but also creating some interesting shapes.
Rendered with Corona Renderer with a Light Tracer integrator. This scene is practically impossible to render using the standard path tracing or irradiance caching.