Main._Process composites visible objects in ascending-handle order from their live surface (resId->BMP); GodotAdvHost.DrawTexture no-op'd (retained), ResolveResIdTexture added. Restored the --boot system-boot handling that the revert had dropped (Main.cs was running cold, which is why nothing matched the oracle). Verified: booted opening event CG renders correctly. Selftest green. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>