Fixed:
falling through the ground in first person (all environments, also with a basement), materials now land on exactly the wall and side you click, per-door materials with working undo, GLB import now tells you why it fails instead of doing nothing, imperial measurements snap to real inch steps (no more lost inch or offset 90° corners), and roof tiles no longer flicker where they meet a wall.
New: sliding doors, side glasses for interior doors, "Make it mine" to edit downloaded creations, material name tooltips, mouse sensitivity slider, faster first-person walking, and free orbit that follows you instead of snapping back to the building's centre.