webgpu pathtracer

left mouse - focus, rotate
right mouse - look
double click - switch rotation mode medusa-sun
s - save picture
space - dome on-off
esc - reload in preview mode

Imaginary thread weaving entities.
Elektromedusae are drive by a magnetic field
and they slowly gain more detail over time.
After a while, drawing is done in tiles to save performance,
this makes progress on high resolutions slower.
Written without tools or ai.