WorldPainter (In-Game Terrain Editor)

An in-game world editing and terrain sculpting suite for Minecraft. It replicates the layout, tools, and workflows of the standalone WorldPainter application directly inside Minecraft through a dedicated interface.

Getting Started & Controls

• Open / Close GUI: Right Shift (configurable in Controls)
• Pan Map: Click and drag with Middle Mouse Button or Right Mouse Button
• Zoom Map: Ctrl + Mouse Wheel
• Adjust Brush Size: Mouse Wheel
• Paint / Sculpt: Left Mouse Button (apply / raise), Right Mouse Button (erase / lower)

Tools & Sculpting Suite

• Height (Raise / Lower): Raise terrain with left-click, lower with right-click.
• Flatten: Level terrain toward a target elevation (Modes: Normal, Raise Only, Lower Only).
• Smooth: Smooth elevation differences across terrain.
• Mountain: Sculpt steep peaks and ridges.
• Pyramid: Form sharp, geometric elevations.
• Erode: Apply erosion-style terrain smoothing.
• Spray Paint: Scatter materials, biomes, or layers using brush intensity.
• Pencil: Solid placement of materials and biomes.
• Fill (Bucket): Contiguous surface flood fill for blocks and biomes.
• Biome Painter: Paint biome IDs directly onto terrain columns.
• Water / Lava: Place surface water or lava bodies.
• Sponge: Remove water and lava within the brush radius.
• Flood Basin: Fill enclosed basins with water or lava up to a target level.
• Select: Create rectangular selections for filtering and global operations.
• Spawn Point: Set the world spawn coordinates.

Brushes & Filtering

Brush Engine

• Built-in Brush Shapes: Circle, Dome, Cone, Plateau, Mountain, Noise, Square, Ring.
• Custom Bitmap Brushes: Load grayscale .png brushes placed in .minecraft/worldpainter/brushes/.
• Adjustable Parameters: Radius (Size), Intensity (0–100%), and Rotation angle.

Constraints & Mask Filters

• Height Constraints: Restrict application to At or Above / At or Below specific Y-levels with optional edge feathering.
• Slope Constraints: Limit application based on surface angle (Slope Above / Slope Below degrees).
• Block Masking: Restrict painting to Only On or Except On selected block types.
• Selection Mask: Apply operations only Inside or Outside the active selection.

Layers & Palettes

• Terrain Palette: Surface blocks (Grass, Dirt, Sand, Stone variants, Clay, Snow, Ice, etc.) with custom block picker support.
• Biome Palette: Standard Minecraft biomes.
• Built-in Layers:
  • Frost: Places snow layers and freezes water.
  • Caves / Caverns / Chasms: Subterranean cave carving.
  • Resources: Places underground ore clusters.
  • Tree Layers: Deciduous, Pine, Swamp, and Jungle tree placement.
• Custom Layers:
  • Custom Objects: Spawns .schematic structures placed in .minecraft/worldpainter/schematics/.
  • Custom Ground Cover: Configurable block state and surface thickness.

Generator, Heightmaps & History

• Procedural World Generation: Generate terrain using presets (Island, Hills, Alpine) with custom seed and size settings.
• Heightmap Import / Export: Import grayscale PNG images directly into world height, or export terrain to PNG heightmaps.
• Global Operations: Apply fill, raise/lower, biome changes, or layer applications across entire selections.
• Undo / Redo: Multi-step history system for terrain modifications.