◆ Plaster

Stone brick terrain mold

A sprue of chiselled dungeon wall bricks for tabletop terrain, cast in plaster and glued up into walls.

Make your own tray mold
3D render of a printed orange tray with rows of stone brick cavities, and white plaster brick sprues in front
Plaster ~126 g Pro early access

A printed tray that casts two sprues of dungeon wall bricks at once, 34 bricks a pour: full blocks 1 x 1/2 inch, half blocks 1/2 x 1/2 inch, all half an inch deep, each face chiselled a little differently and some with a chipped corner, so a wall never looks copy-pasted.

Read more

Made with our tray mold generator in its rigid tray mode: print it, wipe in release and pour casting plaster or dental stone. Cast a few trays, glue the bricks up in a running bond with wood glue, and build walls, pillars, doorways and ruins for D&D, skirmish wargames or a diorama, block by block, the way plaster terrain has been built for decades.

The zip carries the tray exactly as the tool exported it, the brick sprue on its own as an STL, the master uploaded to the tool, and a print and pour sheet with the volume of each cavity.

Shown as a 3D render of the printed tray with cast plaster brick sprues in front, not a photo.

What you need

3
  • Casting plaster or dental stone, about 62 ml per sprue
  • Mold release, petroleum jelly or cooking spray
  • Wood glue, a flat board and terrain paints

How to cast it

4

  1. Print the tray as exported, cavities up, no supports. PLA is fine: plaster only gets warm as it sets.

  2. Wipe a thin film of mold release, petroleum jelly or cooking spray into every cavity, including the fine detail.

  3. Mix casting plaster to a pouring cream (add pigment now if you want colour), fill each cavity and tap the tray on the table for a minute to lift the bubbles.

  4. Leave it for an hour until the plaster is warm and hard, then flex the tray corners and tip the pieces out. Let them dry for a day before you add oils or paint.

Print details

4 h 40 minPrint time
~126 gFilament
1Printed parts
191 × 89 × 18 mmSize (W x D x H)
All print details
Print details
Cast materialPlaster
Printed parts1
Size (W x D x H)191 x 89 x 18 mm
Print bed needed192 x 89 mm, 19 mm tall
Filament~126 g
Layer height0.2 mm
Infill15%
SupportsNot needed
DownloadZIP: printed tray (STL) + one brick sprue (STL) + tool master (STL) + print and pour sheet
Added2026-09-25

Pro early access until October 25, 2026, then free with any account.

Make your own tray mold →

Made with the free Tray mold generator. Upload your own model and get the same kind of mold built around it, in your browser.

Free for personal use. Selling the pieces you cast needs a commercial licence (Pro or Founder); passing on the file itself is not permitted on any plan. Full terms.

New to casting? Read the ice cube tray mold guide.

terrain brick molddungeon wall moldplaster brick moldtabletop terraindnd terrain moldwargaming scenery mold

Questions about this design

How do I build a wall from the stone brick terrain mold?

Lay the first course of full bricks on a flat board, then start the next course with a half brick so the joints are staggered, and glue each brick with wood glue. Let every three or four courses set before adding more, so the wall does not slump.

How many stone bricks do I need for a dungeon room?

A 6 x 6 inch room with walls two inches tall, one brick thick, uses roughly 100 full bricks, about three pours of this tray. Cast in batches while you build; plaster sets in about an hour, so you can pour the next tray while the last course dries.

Why do my plaster bricks come out with holes in the face?

Air trapped against the chisel marks. Brush a thin first coat of plaster into each cavity, fill it, and tap the tray on the table for a full minute. Scrape the backs flat with a ruler before the plaster sets, so the bricks stack square.

More designs

See all plaster molds →