python_3d_surface.gd turns RenderGame's recorded draws into meshes under a
camera read back from SetPerspective; textures come from the 40250 packs.
GetFarClip and the CMapManager ctor ported verbatim. Until the environment
is ported, lit draws with no light/ambient are shown unshaded (stand-in).
script/python_game_render_test.sh runs system.py login -> select -> game
against port_fake_login_server (or --live via MT_LIVE_*) and screenshots.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>