Stereo Camera Rig for VR Architecture Walkthroughs (2D)

Every VR architectural walkthrough renders the same room twice — once per eye — from cameras offset by the interpupillary distance. This top-down 2D simulator builds that stereo rig for a small furnished interior: an off-axis (asymmetric-frustum) mode that matches how real headsets render, and a toe-in mode that rotates each eye inward the way a naive implementation might. Adjust IPD, convergence distance and the architectural model's build scale, and watch the live disparity readouts and the geometric-error indicator expose the keystone artifact that toe-in rendering introduces and off-axis projection eliminates — plus a scale-perception gauge showing when a mismatched IPD or model scale would make a real headset wearer feel like a giant or a miniature inside the building.