The infinite-scrolling town in our Infinitown gamecenter port isn't procedurally generated — it's a Möbius carpet. A 9×9 pool of pre-built chunks maps onto a 9×9 grid of fixed container slots through modulo arithmetic, and camera drags rebind slots to different pool entries instead of spawning new geometry. This post walks the four moving parts (pool, containers, mapping, drag event) and explains why the whole system holds together with zero allocations at runtime.
A road-surface flicker in our Infinitown gamecenter port survived every shadow-parameter tweak we threw at it — bias, normalBias, PCF radius, a 4096² shadow map, snap-tracked light. It turned out to be four separate depth-buffer bugs stacked on top of each other, only the last of which was a shadow problem. This is the debugging log — what we tried, what the symptom kept telling us, and the diagnostic toggles that finally isolated each layer.
