#1 · Original PostApr 30, 2026, 7:19 AM
Trying to find out why a single 4K car texture pack causes my FPS to drop from 120 → 60 on a 4090.
Not a VRAM problem (16GB used / 24GB). Not stream memory either (extender configured).
Profiled with NSight: looks like the bottleneck is mip generation on streaming. Pack ships with pre-generated mips but the engine isn't using them - regenerating on load.
Fix in progress: rebuilding the .ytd with explicit mip flags. Will update.