FastMap 2.0: decouple startup and rendering

The optional mode registers a region with its previously stored map UUID first. A bounded serialized queue renders a new map later. Old referenced map assets are retained until GridService publication succeeds.

Opt-in example

[Map]
GenerateMaptiles = true
MapImageModule = "Warp3DImageModule"
RenderMeshes = true
FastMapAsyncStartup = true
FastMapStartupDelaySeconds = 120
MaptileRefresh = 0

Default: synchronous maps remain active. A new region may temporarily lack a tile, and manual generate map remains synchronous. Pending jobs are canceled during shutdown.

Warp3D RenderMeshes

The development code validates mesh LLSD/zlib LODs, avoids unsuitable JPEG2000 calls and caches geometry within a render. Damaged or missing source meshes cannot be repaired by a renderer cache.