Desktop voxel painter · Windows

Paint it by hand.
Build it with AI.
Ship it anywhere.

Pixl Struktur is a slice-by-slice voxel editor where your brush, Claude and any MCP agent work on the same model. Pin engine metadata straight onto voxels, then export GIFs, spritesheets, .vox and glTF in one pass.

See how it works Export formats
Voxel main battle tank built in Pixl Struktur, three-quarter view
476models built with it so far
30MCP tools for any agent
128×128×64build volume, 255 layers
6export formats + presets

Made in Pixl Struktur

From hero props to whole armies

Detailed close-up assets and game-scale fleets come out of the same editor: one consistent scale, palette and lighting across hundreds of units.

Voxel submachine gun
Compact SMG hero scale
Voxel CH-47 Chinook helicopter
CH-47 Chinook 6 separate parts
Voxel T-90 tank
T-90 game scale
Voxel RAH-66 Comanche
RAH-66 Comanche tagged pylons
Nine tank variants from one roster, side by side
A full roster, one art direction 9 variants · shared palette & scale

Human tools × AI × MCP

Three ways in. One model. One undo history.

No separate "AI mode". Claude and external agents paint with the same slices, layers and tags you do, so you can take over at any voxel, and every AI step is a single Ctrl+Z away.

You

Precise hand tools

  • Slice editor with ghost of the slice below
  • Paint, erase and pick directly in 3D
  • Mirror X for symmetric hulls and fuselages
  • Nested layers: hide, lock, move without clipping
  • Screen colour picker with 48× loupe
Claude

Built-in AI modelling

  • Describe a model, drop in reference pictures
  • Watch it build live in the active tab
  • "Style from…" copies scale, palette and detail density from another tab
  • Renders previews of its own work and fixes it
  • Several tabs can build in parallel
Any agent

MCP server

  • 30 tools: slices, layers, shapes, tags, palette, export
  • Sees and drives every open tab, even in the background
  • Rasterised primitives: cylinders, domes, lathes, slopes
  • Batch plans from JSON with run_plan
  • Returns preview images the agent can inspect
01 · youBlock out the hullPaint the silhouette slice by slice.
02 · claude"Add the turret detail"Follow-ups continue the tab's conversation.
03 · youFix what mattersRecolour, nudge layers, undo any AI step.
04 · agentBatch the fleetExport 32-direction sheets for every tab.
// .mcp.json — connect any MCP client { "mcpServers": { "pixl-struktur": { "command": "node", "args": ["out/main/mcp.js"] } } }
// an agent paints, tags and exports paint_shapes { shape: "cylinder", layer: "Barrel" } add_tag { type: "Muzzle", x: 3, y: 9, z: 1 } export { kind: "sheet", frames: 32 } export { kind: "glb", glb: { scale: 0.283 } }

Painting + metadata

Paint the look. Tag what the engine needs.

Swatches carry colour and material together. Tags pin gameplay data to individual voxels and travel with layers, sheets and exports.

Material swatches — roughness, metalness and emissive glow per colour. Presets: Matte, Metal, Glow.
Tags on voxels — Pivot, Muzzle, Exhaust, Pylon and your own types, each with a short value like S1. Even tags in mid-air, like a muzzle point in front of the barrel.
Engine-ready — tags land in JSON sidecars and as Type:value nodes in glTF, so turrets pivot and missiles spawn at the right spot.
Tank with Muzzle, Pivot and Exhaust tags highlighted
Muzzle · M1
Pivot · T
Exhaust

Export

One model, every pipeline

A full-screen export view with live animated preview. Pick a voxel style, lighting and colour grade once, save it as a preset, and re-export the whole fleet with one click.

rah66-sheet.png · 32 × 88×48
fa18c-sheet.png · 32 × 71×42
.gif

Turntable GIF

Smooth 360° spin, model kept dead-centre, measured framing so nothing flickers or crops.

.png + .json

Spritesheets

Rotation strips or per-slice stacks for sprite stacking. JSON sidecar with angles, anchors and tags.

.glb

glTF 2.0

One node per layer, PBR materials, tags as nodes. Greedy meshing and vertex welding with live triangle counts.

.vox

MagicaVoxel

Import and export with metal, roughness and emissive MATL chunks intact.

.json

Data export

Every tag with type, cell and value, optionally the palette and an RLE voxel volume.

.pxvpreset

Looks & presets

Sharp, rounded, Lego or grid voxels. AO, rim light, soft shadows, colour LUTs. Pixelated or 2× supersampled.

Your brush, your agent, one model.

Pixl Struktur is a Windows desktop app with a one-off license. No subscription.

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