Window and Door 3D Models for Archviz: Real Sizes and Wall Cutters

Short answer: a window or door 3D model works in an architectural render when it is built at a real opening size, matched to the depth of the wall it sits in, and ships with a cutter object that cuts its own hole. Place the model, let the cutter subtract the rough opening from the wall, and the frame, reveal and sill line up without any hand modelling. Below are the sizes, wall depths and setup we used for the ten doors and windows in Linden House.

Most results for "window 3D model" are marketplace grids of single objects. This guide is about the part those listings rarely state: how an opening model meets the wall. Sizes and triangle counts come from our live product pages, and the construction rules from the Linden House collection plan, checked in October 2026.

Why openings break archviz scenes

A door or window is the one asset in a room that has to agree with the architecture. A sofa can stand anywhere; a window has to sit inside a hole of exactly its size, in a wall of exactly its depth. Three problems show up again and again in renders:

• A frame floating on a solid wall. The window was placed, but no opening was cut, so daylight never enters and the glass shows plaster behind it.
• A frame thinner than the wall. The jamb lining stops halfway through the reveal, leaving a visible gap or raw wall faces around the frame.
• A stretched model. A 0.8 m door scaled to fill a 0.9 m gap gets fat stiles, oval hinges and a handle that is too wide. Close cameras catch it at once.

Each of these is solved at the asset level, before the model reaches your scene: a cutter for the opening, a frame built for a stated wall depth, and size options that are rebuilt rather than scaled.

Real sizes: the ten Linden House doors and windows

Every size below is the default option as listed on the product page, measured as width x depth x height in meters. Depth includes frames, architraves and hardware, so it is larger than the wall itself. Triangle counts are the Studio and Realtime profiles of that default option.

Two patterns are worth copying for your own scenes. One: interior doors share one height: the collection plan sets a 2.04 m tall, 40 mm thick leaf, which is why four of the five interior sets finish at 2.14 m overall once the frame head and architrave are added. The other: the triangle count follows the detail, not the size. The 3.00 m patio door is 2,152 Realtime triangles because it is two large panes in slim frames, while the French doors reach 15,364 because each of the two leaves carries ten glazed panes and its own frame bars.

The Pocket Sliding Door lists 1.70 m wide against a 0.80 or 0.90 m leaf, because the leaf slides into a cavity beside the opening. Allow for that run of wall when you lay out a corridor.

Wall depth: match the frame to the wall

Linden House builds every room with real wall thickness: 0.12 m for interior walls and 0.30 m for exterior walls, as set in the collection plan. The opening assets are split along the same line. Interior doors come for 0.10, 0.15 and 0.20 m walls; windows and the patio door for 0.20, 0.30 and 0.40 m; the front door for 0.25, 0.30 and 0.35 m.

Pick the option closest to your wall, not the default. A window for a 0.20 m wall dropped into a 0.40 m wall leaves 0.20 m of bare reveal with no lining, and the sill will hang in mid air. The depth also changes the light: a deep reveal throws a longer shadow edge across the glass and the sill, which is much of what makes daylight through a window read as real. In our Reading Nook scene we used a 0.40 m exterior wall so that the inward-opening casement still left enough sill for a row of books.

Rebuilt, not scaled: why size options are separate files

Each option ships as its own BLEND, GLB, FBX and OBJ files. The plan's rule is that every option is rebuilt at its dimensions while keeping board thickness, bevels, gaps and hardware at their real size; nothing is uniformly scaled or stretched. A 0.70 m flush door therefore has the same 40 mm leaf, the same hinge size and the same lever as the 0.90 m version, only a narrower leaf.

This matters most for glazing. The Casement Window comes in 0.80, 1.20 and 1.60 m widths. Scaling the 1.20 m model to 1.60 m would widen every frame member and the handle by a third; the rebuilt 1.60 m option keeps the frame profile and widens only the glass. Left and right hand versions are also separate builds, so the hinges, the handle and the swing direction are correct instead of mirrored text and flipped hardware.

Cutting the opening in Blender

Each of the ten doors and windows ships with a cutter object for its rough opening, named with a CUTTER_ prefix. The plan places every opening asset's origin at the bottom centre of the rough opening, on the centre plane of the wall. That gives a simple placement rule: snap the asset's origin to the floor line (or the sill line for a window) at the middle of your wall's thickness, and the frame sits centred in the reveal.

To cut the hole in your own wall, use Blender's Boolean modifier. The steps below follow the Blender manual's Boolean Modifier page:

1. Select your wall object and add a Boolean modifier.
2. Set Operation to Difference, which the manual describes as cutting the source mesh out of the modified mesh.
3. Set Operand Type to Object and pick the CUTTER_ object of the door or window. For a wall with several openings, gather all the cutters in one collection and set Operand Type to Collection instead.
4. Hide the cutter in renders. Keep the modifier live while you are still moving windows; apply it only when the layout is final.

The manual notes that proper results are only assured on manifold (closed) meshes, and that the Manifold solver does not work at all on non-manifold meshes. If your wall is a single plane or has open edges, give it thickness before you cut, or use the Exact solver. Parenting each cutter to its door or window keeps the hole and the frame together when you move them; in the Linden House scenes, the room shells are cut by exactly these cutter objects.

Moving parts and glass

Doors and windows are more convincing half open than closed. The plan puts every leaf and sash in its own pivot group: the Casement Window's two sashes, each interior door leaf, and both French door leaves rotate on their hinges, while the pocket door and the patio door use slide-pivot groups that run along their tracks. The casement product render shows one sash open inward, which is a quick way to read a window as a window rather than a picture of one.

Glazing is modelled with real glass thickness, and the plan specifies double glazing with spacer bars and a cavity for the casement, so reflections and refraction behave like a real unit instead of a single flat plane. If you plan to light a room through its windows, our room 3D design breakdown covers sun angles, window portals and cameras for the same scenes, and the kitchen 3D design reference shows the same metric approach applied to cabinets.

Studio or Realtime geometry

Every opening asset comes in two geometry profiles. Studio is for close still renders, where frame bevels, hinge knuckles and glazing bars carry the shot. Realtime is lighter for web viewers, VR walkthroughs and interactive configurators, at roughly a third to a half of the Studio count for most of these assets. For a sense of what those numbers mean in a real-time scene, see our guide to triangle counts for low poly models. The Linden House files are in meters with Z up, so they arrive at the right size in Blender without rescaling. All ten doors and windows are also part of the Architectural Elements Kit and the wider Linden House collection, with more pieces in architectural fixtures.

Common questions

How do I cut a window into a wall in 3D?

Give the wall real thickness, place a box the size of the rough opening through it, and subtract the box with a Boolean difference. With a window model that ships its own cutter, the box is already made to the right size, so you only add the modifier and choose the cutter.

How do I cut a hole in a wall in Blender?

Add a Boolean modifier to the wall, set Operation to Difference and pick the cutting object, or a collection of cutters for several openings. The wall should be a closed mesh; if it is a single plane, add thickness before cutting.

How do I make a window in Blender?

You can inset and extrude faces of the wall and model the frame yourself, which suits simple shapes. For renders, a window model built at a real size with a frame for your wall depth and its own cutter is faster and keeps the reveal, sill and glazing consistent from room to room.

What size is a standard interior door in 3D?

In common European metric practice, leaves are 2.04 m tall and 40 mm thick, in 0.70, 0.80 and 0.90 m widths. With frame and architraves, our interior door sets measure 2.14 m overall.