◆ Plaster
Stone brick terrain mold
A sprue of chiselled dungeon wall bricks for tabletop terrain, cast in plaster and glued up into walls.
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◆ Plaster
A sprue of chiselled dungeon wall bricks for tabletop terrain, cast in plaster and glued up into walls.
Want your own version? Make it free in our tray mold tool. A free account gives you free downloads every week.
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.
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.
Print the tray as exported, cavities up, no supports. PLA is fine: plaster only gets warm as it sets.
Wipe a thin film of mold release, petroleum jelly or cooking spray into every cavity, including the fine detail.
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.
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
| Cast material | Plaster |
|---|---|
| Printed parts | 1 |
| Size (W x D x H) | 191 x 89 x 18 mm |
| Print bed needed | 192 x 89 mm, 19 mm tall |
| Filament | ~126 g |
| Layer height | 0.2 mm |
| Infill | 15% |
| Supports | Not needed |
| Download | ZIP: printed tray (STL) + one brick sprue (STL) + tool master (STL) + print and pour sheet |
| Added | 2026-09-25 |
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 download. Opens the Thingiverse listing in a new tab.
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.
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.
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.
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.
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