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Fenestra builds real windows inside Blender, from a six over six Georgian sash under a brick jack arch to a black steel factory window with broken panes, a Tudor leaded light in a stone mullion, a Victorian bay on a brick knee wall or a slate gable dormer. Pick one of 71 designs and change anything: every part is a number, a choice or a switch, and the window rebuilds live as you drag.

Every window is built like the real thing: a moulded frame, sashes with stiles, rails and meeting rails, single, double or triple glazing with spacers and gaskets, glazing bars in the pattern you choose, and hardware on the inside. Sashes really open: hung sashes slide, casements, awnings and hoppers swing, tilt and turn sashes tilt or turn, sliders slide, jalousie louvers turn and pivot sashes rotate.

Dress it with a stone, concrete, wood, brick or metal sill, a lintel, keystone, jack arch, soldier course, arch ring, hood mould, cornice or pediment, a casing or quoins, louvered, panel or board and batten shutters, and security bars. Put it in a piece of wall with real reveals, in a dormer on a roof, or cut its opening into your own wall in one click.

A design for every style
Georgian and Victorian sashes, Tudor leaded lights, Gothic lancets, oculi, Palladian windows, Crittall and factory steel, Provence shutters and Spanish rejas. Pick one and change anything.

Sashes really open
One Open slider: hung sashes slide, casements swing, tilt and turn sashes tilt. Awnings, hoppers, sliders, pivots and jalousies too.

Any outline, the grille follows
Rectangle, rounded, segmental, round top, elliptical, Gothic, Tudor, peaked, trapezoid, half round, round and octagon, at any size.

Surprise me
One click makes a new random window: a design, a variation of its proportions and often a fresh finish.

Features

• 71 designs in ten families: sash, casement, picture, arched and round, gable and dormer, bay and bow, sliding, industrial, historic and Mediterranean
• 11 window types: fixed, double and single hung, casement, awning, hopper, sliding, tilt and turn, pivot, jalousie and industrial steel
• 13 outlines: rectangle, rounded, segmental, round top, elliptical, Gothic, Tudor, peaked, trapezoid, triangle, half round, round and octagon, at any size
• 9 grille patterns: colonial grid, Prairie, Queen Anne, diamond leaded, sunburst, spider web, arch fan and cottage
• Mullions, transoms, French pairs, Chicago windows and Palladian windows
• Bay and bow windows with knee walls and hip roofs
• Gable, shed, hipped and barrel dormers on a roof
• Sills, lintels, arches, pediments, casings, quoins, shutters and security bars
• Cut Into Wall: a live Boolean opening in your own wall that follows the window
• Photo-scanned PBR materials: painted and stained wood, uPVC, aluminium, steel, bronze, stone, brick, stucco, slate and nine kinds of glass, ready for game engines
• Surprise and Vary buttons, a picture-driven sidebar, Shift+A menu and Convert to Mesh
• One clean mesh object per window, works in Cycles and EEVEE

Requires Blender 4.2 or newer. Tested on Blender 4.2, 4.5 and 5.2 LTS.