Argon 3D Fidelity Atlas v177.0 — 890 models

Gemini 4 Argon deployed v177.0 (commit 8b2412ec): 890 real-world 3D models. Adds North Dakota Theodore Roosevelt Badlands & Killdeer Mountains, Fargo 3D skyline, Redwood LivingRoom frags 4–16. Viewer: argon-3d-fidelity-atlas-e63fc6.gitlab.io. Standing 379 held.