Is the room trainable?
Algorithms infer geometry from pixels, not human spatial intuition. Bare walls and tiny baselines starve matching; include stable texture and allow enough baseline change.
Three heights and a looped route
Shoot three vertical bands (high/mid/low) and keep a wall-hugging loop so corners stay observable. Use companion tutorial video as a motion reference; follow your capture app for device-specific settings.
Macro mode and working distance
Very close distances can trigger macro modes or aggressive perspective shifts, hurting intrinsics consistency. Keep a comfortable working distance (rough tens of centimeters) and spot-check focus breathing. [unverified]