Import

Everything below lives in the Import menu.

Source	Formats	Goes to
Heightmap	.png .tif	Terrain heights
Colormap	any image	Materials & ground covers of the map
Layers	.voxelierl .voxelier	Project layers
Schematics	.schem .bp .litematic	Library
3D models and images	.obj .glb .png .jpg .bmp .gif .tga .tiff .webp	Library (voxelized)
Mod JAR and resource pack	.jar .zip	Block and texture source
WorldPainter world	.world	A whole new project

Heightmap

A grayscale image becomes the terrain heights. Decoded as 16-bit luma.

The dialog maps the pixel range onto an altitude range, and can resize the project to the image.

Colormap

A color image mapped to blocks by nearest color. Posterization reduces it to N colors, each color being assigned to a material.

Layers

.voxelierl files are single layers exported from the Layers panel to be reused. A .voxelier project brings in all of its layers, without touching the terrain.

Layers can also be reused between projects through the layers library.

Schematics

Adds .schem (WorldEdit / Sponge), .bp (Axiom) and .litematic (Litematica) to the library, shared by every project. See the schematics library.

3D models and images

.obj and .glb are voxelized into a .bp saved in the library, at an adjustable resolution. A .glb carries its colors and maps them to the 16 Minecraft wool colors.

The same window voxelizes an image into a slab, one block per pixel in wool colors, laid flat or standing upright.

See Import 3D models and Import image in the libraries.

Mod JAR and resource pack

Both go to the Block and texture sources window. A mod JAR brings the block IDs and textures of a Minecraft mod: its textures become visible and its block names get autocompletion. A .zip resource pack replaces the textures on screen. Top sources override the ones below.

WorldPainter world

Converts a .world into a new project at its original dimensions. The dialog picks what to bring over: terrains, ground covers, schematic layers and 3D objects, annotations, biomes.