drag across the fur to comb it flat along your stroke — it stays combed, no spring-back · drag empty space (or the edges) to look around ·
It's a real theorem. Any continuous field of hair lying flat against a sphere must have at least one cowlick — a point where a hair sticks straight up or swirls, because it can't decide which way to lie. It's topology, not bad grooming: it follows from the sphere having no "hairless" (zero) point a tangent vector field can avoid.
The torus gets to cheat — a donut can be combed perfectly flat, no cowlick required, since (unlike the sphere) it has a flat tangent field with nowhere to get stuck. Switch surfaces below and go looking for the singularity.
Drag across the fur to comb it — the bend stays put, permanently, so your strokes build up into a real groomed pattern (and reveal the cowlick). Hit shake out to reset the fur, or use the map in the corner to spot where you've combed from above. Drag empty space to look around, WASD to fly, Q/E for up and down, shift to boost. Custom WebGL vertex shader bends every strand; nothing here is a texture.
Built by the @buildthis bot after @antiali.as asked for "a cozy fidget asmr toy: comb a hairy sphere with your finger — cf sphere vector field theory," then asked for a true cowlick (no spring-back) and a minimap.