Low Poly Door 3D Model

A simple mobile interior door can be 120 to 300 triangles, including a flat slab, handle and frame. A medieval or dungeon door with planks, metal straps and hinges usually sits between 500 and 1,200 triangles. A desktop hero door with carved panels, locks, peephole and animated latch can use 2,000 to 4,000 triangles. For modular buildings, the door, frame and threshold should be separate enough to fit wall kits, but still share one atlas so many doors in a town do not create many material changes.

The door-specific technical fact is hinge pivot placement. The moving door mesh must have its origin on the hinge line, not at the center of the slab, or the door will rotate like a spinning panel instead of swinging through the doorway. Keep the frame as a separate static mesh with its own bottom-center origin, then export the door leaf as a child object whose local pivot sits exactly on the hinge side. This is the difference between an animation-ready asset and a prop that must be fixed after import.

Collision should have two states. A closed door needs a box collider matching the slab to block the player. An open door often disables that collider or swaps it to a thin collider along the open angle so players do not hit an invisible wall. If the door controls navigation, bake the navmesh with a doorway opening and use runtime obstacles or links for the closed state rather than baking the door as permanent wall geometry.

Materials should make interaction readable. Give the handle, keyhole or latch a contrasting metal color so players can identify the usable side. For medieval doors, planks should have uneven heights and bevels, but do not model deep cracks as separate geometry unless the camera gets close; a few dark vertex-color bands or atlas strokes sell the gaps cheaply. For 3D printing, fuse the frame and door if it is decorative, or leave clearance around the hinge if it is meant to open physically.

Low poly doors fit houses, castles, dungeons, shops, sci-fi rooms, AR architecture previews and tabletop terrain. Export FBX for Unity and Unreal to preserve the door/frame hierarchy and hinge pivot, GLB for Godot and web viewers, or STL/3MF for decorative prints. Generated door models are yours for commercial use with no attribution required.