Raymarch Voxel Engine

Demo | Website | Documentation

Raymarch voxels in one paragraph

Raymarch Voxel Engine is a GPU-driven voxel engine for Unity URP. It doesn't turn voxels into triangle meshes. Instead, it stores them in 3D textures and raymarches every pixel, so worlds of millions of voxels render and edit in real time with no meshing or remeshing.

NEW IN V1.2.0: THE WORLD & WATER UPDATE

• Real-time voxel water. It flows downhill, fills basins, builds pressure and levels out through tunnels. Dig a channel from a lake and watch it drain. It's rendered with refraction, reflections, depth absorption, caustics, sun glints and 3D voxel waves.

• Infinite worlds. Terrain streams in around the player, is generated on worker threads with Burst, and your edits are kept when chunks unload.

• Node-based biome editor. Design biomes visually with a live preview, then blend them across a temperature and humidity climate map. Seven ready-made biomes are included: Plains, Forest, Desert, Mesa, Highlands, Tundra and Swamp.

• MagicaVoxel structures. Drop .vox models into a biome to scatter wells, ruins, towers and statues across the world.

• Generated seas and lakes, a liquid brush, and support for the new Input System.

HOW IT WORKS

Each voxel volume is a 3D texture, and each texel is a voxel. For every screen pixel, a ray enters the volume and steps through a coarse macro grid to skip empty space. It then switches to a precise DDA grid walk until it hits a solid voxel. That voxel's palette entry supplies the material, and lighting runs from there. Edits are direct texture writes: no greedy meshing, no chunk rebuilds, no hitches.

FEATURES

• Destructible terrain. Carve and build at runtime with sphere, cube and cylinder brushes, full undo/redo, and edits that continue seamlessly across chunk borders.

• Structural physics. Pieces that lose their support break off and fall as physics objects.

• Voxel cone traced global illumination. Bounce light, emissive voxels, glossy reflections and pitch-black caves, updated only where the world changes.

• Volumetric explosions, smoke, clouds and fog, with scattering and self-shadowing.

• Soft, stable shadows across cascades, plus cross-volume sun shadows.

• Procedural trees, biome surface layers, beaches and cliffs.

• A 256-entry material palette with PBR and emissive properties.

• MagicaVoxel .vox import.

• Two demo scenes: Demo Terrain (an infinite biome world with water) and Demo Physics (destruction).

• A 35-page illustrated manual, setup guide and editor self-tests.

Built for Unity 6 and URP (Render Graph). Full source code is included.