All #JuliaSet at once, trustworthily calculated with #IntervalArithmetic (exterior -> transparent, interior -> blue, unknown -> orange). #4D #voxel grid randomly oriented, animated rotation perpendicular to the screen.

12m20s on a single core to calculate the 4D voxel grid at level 8 (2^8 along each edge, total 1GB data with 2 bits per cell).

5m07s real / 67m40s CPU stepping rays through the voxels for #volumetric #rendering to make the 120 frame animation.

Maybe it would render faster on a GPU.