UGC LXFML brick transforms are relative to the model's own origin, but the
LDD viewer added the bricks straight to the scene and never applied the
model's properties_contents position/rotation, so the models ended up around
(0,0,0), far below the property ground plane. Properties with only
brick-built models showed just the green ground.
Build each LXFML into its own THREE.Group placed with the saved
position/quaternion (like pre-built models), load each file into a fresh
Scene, and target the single-model camera at the placed model.
Co-authored-by: bob-g-code <346622190+bob-g-code@users.noreply.github.com>
