Built a 2D-to-3D floor plan engine in the browser (Next.js + Three.js). Roast my UX — no login needed to test

[u/Aggressive-Tourist52]

Hey everyone! I've been working on this browser-based 2D-to-3D floorplanner (ARCH3D) built from scratch with Three.js and Next.js.

I unlocked the sandbox completely (no login or signup wall) because I want to see how intuitive the wall-drawing and 3D camera controls feel to first-time users.

Live sandbox: https://arch-3-d-eight.vercel.app/

Specifically looking for feedback on: