Motif

Random ashlar pattern — free hatch (.pat), texture & 3D tiles

Random ashlar is a stone layout built from 38 tiles per repeat (sizes 900 × 250, 800 × 250, 700 × 250 mm (+16)), repeating on the lattice a = (3600, 0) mm, b = (0, 1800) mm, a cell of 6480000 mm². The seamless texture repeat is 3600 × 1800 mm. Download it as a CAD hatch, a seamless texture or SVG and DXF lines, count the tiles for your room, or build it as real 3D tiles in SketchUp. All free.

Random ashlar tile pattern: tiles drawn with their joints

Random ashlar in numbers

CategoryStone, paving and cobble
Tiles in one repeat38
Lattice vector a(3600, 0) mm
Lattice vector b(0, 1800) mm
Repeat cell area6480000 mm²
Tile sizes900 × 250, 800 × 250, 700 × 250, 300 × 250, 600 × 250, 800 × 300 mm (+13)
Seamless texture repeat3600 × 1800 mm
Default length before the pattern repeats3600 (range 600–12000)
Default height before the pattern repeats1800 (range 300–6000)
Default shortest stone300 (range 50–2000)
Default longest stone900 (range 50–4000)
Default stone length step100 (range 10–500)
Default lowest course150 (range 30–1000)
Default highest course300 (range 30–2000)
Default course height step50 (range 10–500)
Default minimum joint stagger150 (range 0–1000)
Default seed1 (range 0–1000000)

Free downloads for Random ashlar

Hatch units are millimetres at the default tile size. For other sizes use the hatch page or the editor, which exports every format at the size you set.

Random ashlar tile calculator

Enter the room, grout and tile size. The count comes from the same engine that lays the 3D tiles, so the cut tiles are real cuts against your room edges (a 4 × 3 m room is shown first). More patterns: tile calculator.

Full tiles
63
Cut tiles
19
Whole tiles used
82
Area (net)
12 m²
Tile area bought
13.72 m²
Waste from cuts
14.3 %
Tiles to order
91
Tiles by size
SizeFull tilesCut tiles
900 × 250 mm104
800 × 250 mm20
700 × 250 mm20
300 × 250 mm42
600 × 250 mm20
800 × 300 mm50
500 × 300 mm31
700 × 300 mm74
900 × 300 mm30
300 × 200 mm40
400 × 200 mm40
500 × 200 mm22
900 × 200 mm42
600 × 200 mm40
800 × 200 mm24
700 × 200 mm20
600 × 300 mm10
300 × 300 mm10
400 × 300 mm10

Open it in the editor or in SketchUp

Open Random ashlar in the editor

Use it in SketchUp (10 free uses a day) motif.rbz

Questions about Random ashlar

How many Random ashlar tiles do I need for a 4 × 3 m room?

With the default tile size and a 3 mm joint, a 4 × 3 m floor needs 63 full tiles and 19 cut tiles (82 whole tiles counting each cut tile as one). The net area is 12 m² and the tiles bought cover 13.72 m², so cutting alone wastes 14.3 %. Enter your own room and tile size in the calculator on this page.

Is the Random ashlar hatch exact?

Yes. The .pat file draws the tile edges exactly: every edge direction of this pattern is parallel to a lattice vector, so a PAT line family reproduces it without approximation. Units are millimetres and the pattern name inside the file is random-ashlar.

How do I use the .pat file in AutoCAD?

Copy the .pat file into a folder that is in AutoCAD's Support File Search Path (Options > Files), keep the file name (the pattern name inside the file matches it), then pick the pattern in the HATCH command. If Windows blocks the download, right-click the file, open Properties and tick Unblock.

How do I use the .pat file in Revit?

In Revit open Manage > Additional Settings > Fill Patterns, click New, choose Custom and browse to the .pat file. Use the model variant when the pattern must keep its real size on the building.

What is the repeat size of Random ashlar?

One repeat of the lattice covers 6480000 mm² with 38 tiles. The smallest rectangle that repeats seamlessly in both directions, which is what a texture image needs, is 3600 × 1800 mm at the default sizes.

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All stone, paving and cobble · All patterns