Open-source voxel editor and toolchain
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Voxie is an open-source voxel editor and toolchain. It features

  • Voxel editor
  • Cross-platform (anything that Qt supports - Windows, Mac, Linux)
  • Block tool, selection tool, bucket fill tool, pencil tool
  • Block copy/paste and move
  • Model scaling and size optimization
  • Global palette (256 indexed colors)
  • 90 degree rotation
  • Export to COLLADA .dae
  • Preliminary support for per-frame animation
  • Support for model reference points (for e.g. a gun or similar)
  • Runtime scripts for Unity3D (not committed yet)

Voxie's editor is written in C++, Qt and Bullet Physics for maximum performance. Toolchain scripts are written in Python to make exporting to your favorite format or engine much more approachable.


Windows binaries

On Mac/Linux, you can build binaries by using CMake. Voxie depends on Qt and Bullet Physics, so make sure you have those dependencies installed.

Why Voxie?

Voxels are quickly becoming popular with indie game developers. Even though many games exist that leverages voxels, the toolchains and editors for voxels are either not available, proprietary or poor.

Few voxel editors support animation, and usually, you hardcode each animated limb using your game engine. For Voxie, the idea was to support per-frame animation like you would with traditional pixel art/animation. This has been implemented using the arrow keys in Voxie, where the camera state is retained between windows.

Voxie also uses a single, indexed palette for all models, which can be changed per-game as necessary.

Alternatives to Voxie include:

  • Qubicle - proprietary, paid, no indexed palette or support for animation
  • Sproxel - last release in 2011, slow renderer, no support for animation
  • Voxatron editor - proprietary
  • SLAB6, VOXED - uses ancient VOXLAP engine, difficult to use, no animation

Using Voxie

Voxie supports the following shortcuts:

Shortcut Function
Ctrl+S Save
Ctrl+C Copy blocks
Ctrl+V Paste blocks
C Pick color
Insert Rapidly use tool primary
Delete Rapidly use tool secondary OR destroy selected blocks
Alt+LMB Rotate camera
Alt+RMB Position camera
Left Select previous window, retain camera
Right Select next window, retain camera

File format

The vxi file format is Voxie's native voxel format. It is structured as follows (no padding, little endian):

struct Voxel
    uint32 x_size, y_size, z_size;
    int32 x_offset, y_offset, z_offset;
    uint8 data[x_size * y_size * z_size]; // entries in palette
    Color palette[256];
    uint8 ref_point_count;
    ReferencePoint ref_points[ref_point_count];

// data indexed using
// palette[data[z + y * z_size + x * z_size * y_size]]

struct Color
    uint8 r, g, b;

struct ReferencePoint
    char * name; // NULL-terminated string
    int32 x, y, z;

In this file format, Z+ is up, Y+ is forward, and palette entry 255 is 'empty' or 'air'.

Each model includes the global palette that was used when it was saved, in case you do not want to use palette.dat.

The global palette file (palette.dat) follows the same structure as the model palette, i.e.:

struct GlobalPalette
    Color palette[256];


Voxie is licensed under the MIT license. Please see LICENSE.txt for the full license details.