5 textures from Cloudflare Flux (free tier) in assets/textures: wall
panels, deck floor, bulkhead, blast door face, machinery greeble.
Runtime mirror-fold makes them seamless; triplanar surface materials
with grid fallback when files missing. Doors use the cropped face.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
