foldspaceA little further into infinity
Frame rate— fps
Surface distance— u
Box folds / sphere inversions

The buried cathedral

Ancient geometry, half-lost in the sandstorm.

WASD fly QE up / down
Drag to look / Scroll to change speed / Shift boost

Your way into the infinite

WASD
Forward, left, back, right
Q / E
Straight up / down
Left mouse drag / arrow keys
Look around
Scroll / + −
Increase / decrease speed
Shift / Alt
Boost / precision flight
R / H / F
Reset / hide UI / fullscreen

Flight slows near surfaces so you can explore tiny details.

Formula references: Tom Lowe’s Mandelbox, Daniel White’s Mandelbulb, Inigo Quilez’s Menger sponge, and Syntopia’s distance-estimation articles.

Rendering your world

Preparing your image…

Preparing your worlds

Compiling the fractal shaders…