Companion

Default maxMemoryFootprintBytes: 256 MiB. Soft SSE-pressure trigger — when exceeded, effective SSE drifts up to load coarser tiles. Sized to throttle the working set BEFORE RenderResourceCache's own LRU starts evicting (typical RR-cache capacity is 3/16 of system RAM ≈ 750 MB on a 4 GB phone). If 3D Tiles consumption climbs past the RR-cache budget the LRU evicts visible tiles every drainPendingMeshUploads call, causing per-frame fallback-tile flicker.