Verdant 20 — Prison Tileset for RPG Maker MZ, Tiled & Godot: Cellblock, Bars & Yard [16x16]

750 tiles at 16x16. One wing of a Victorian prison: painted breeze-block cells, a run of steel bars that actually joins, the landing walkway grating over the well, the ablutions, the outer wall, and the exercise yard beyond it with chain-link, weeds and a raked perimeter track. Built to be painted, not just looked at.

What is in it

• 40 fill tiles — 10 materials × 4 variants, so a painted mass is never one tile repeated.
• 1 transparent overlay — the chain-link fence. Its openings are real holes, so it lays over YOUR ground as well as ours. No opaque fill can do that.
• 564 transition tiles in 12 complete 47-mask autotile sets — inner corners, outer corners, edges and singles. That is 75% of the pack, and it is the part most tilesets skip.
• 36 objects (121 files) — bunks, sanitary units, barred doors, a sliding gate, lockers, a guard desk, trolleys, mop and fire buckets, a radiator, pipe runs, drain covers, bollards, razorwire coils, sandbags, a jerry can, a weight bench, a basketball hoop, a floodlight mast and more. Each ships twice: transparent for your own ground, and grounded on ours with the contact shadow already between the two.
• 2 animated objects (24 files) — a sweeping searchlight and a strip light that will not strike, four frames each, with their sequences declared for Tiled and Godot.
• A finished 36×26 sample map with 98 objects placed — as a PNG, as JSON listing every cell by id, and as a Tiled .tmx you can open and edit.

Three engine importers, and they were RUN

• Godot 4.7.2 — a .tres TileSet, loaded headless and made to COUNT what it built: 750 declared, 750 built, every texture resolved, every multi-cell footprint exact. Its texture paths are relative, so the folder works dropped anywhere in your project rather than only at the project root.
• Tiled — one .tsx per group, each rendered by Tiled's own tmxrasterizer and compared to the shipped sheet. The included .tmx was rendered the same way and compared pixel-for-pixel against the sample-map PNG: 958,464 pixels, 0 differ.
• RPG Maker MZ — a full A2 autotile sheet plus B/C/D/E object pages, round-tripped through the engine's own autotile table. MZ is not installed on the build machine, so this is not a claim to have opened it in the editor.

It also ships the floors it stands on

Verdant 14 Institutional's own concrete screed and corridor lino, and Verdant 17 Urban Decay's asphalt, are in this download — generated by those packs' own modules rather than copied, because a transition needs both sides: a wall has to stand on something. You need nothing else to use this pack, and if you already own either of those, these are literally the same surfaces, so the packs lay one continuous building.

What is proven, and what is not

Every claim below came out of a program, not an opinion. Exact grid: every cell exactly 16x16. Palette lock: every opaque pixel falls inside the declared 100-colour palette, which is what makes tile 750 sit beside tile 1. No anti-aliasing: alpha is strictly binary, nothing scaled or filtered. Autotile completeness: all 12 sets carry all 47 masks. Footprint truth: every tile's declared cell footprint equals its actual pixel size, in both directions. And the pack ships its art twice — loose PNGs and packed sheets — with all 750 compared file by file so the two copies cannot drift.

What this pack does NOT claim is "mechanically proven seamless." No statistical seam test can prove that, and this listing will not tell you otherwise. What is true: every tile's wrap boundary is measured against its own interior, and all 41 4x4 repetition renders ship inside the download so you can look for the grid line yourself on any tile.

Licence

Commercial use permitted, unlimited projects, no attribution required. You may not resell or redistribute the pack itself. Full terms in LICENSE.txt.

AI disclosure

The tiles are generated programmatically by a procedural pixel-art engine written for this series — no diffusion model and no training dataset is involved in producing any tile in the download. The cover illustration on this page IS made with an image model, and the generator's source was written with AI assistance, so this listing carries itch's Generative AI tag.

More from CSAF

More tilesets from the same studio:

• Verdant 00 — Free Sample Tileset [16x16]
• Verdant 01 — Overworld Tileset [16x16]
• Verdant 21 — School Tileset for RPG Maker MZ, Tiled & Godot: Classroom, Corridor, Gym & Yard [16x16]
• Verdant 17 — Urban Decay Tileset for RPG Maker MZ, Tiled & Godot: Cracked Streets & Ruined Interiors [16x16]

Everything else we make is at csaf.itch.io.