A crowd of arriving players was composited in one frame, on the main thread, under the archive lock: 40 geared looks took 76–115 ms.
In 1.12.1 an unforced full composite never waits on its section loads (`0x44b430`), and a unit whose first composite is pending is not drawn: ShouldRender `0x607da0` feeds the draw flag `0x710c50`, and the flag goes to the mount model when mounted. It appears dressed once the composite is done.
Now an arriving body composites on the async pool, one task per look, reading outside the lock. The body, and its mount, are built once the atlas lands. Arriving now costs the main thread 0.26–0.45 ms for 40 looks. The appear fade runs from arrival, as `FadeTo` is armed at create.
A re-dress, a rig heal and the glue and dressing-room previews stay in the frame. Baked NPC skins are unchanged.
Fixes#609🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
