# Blender Environment Kits

Game environments in Blender 5.2 - terrain from noise or heightmaps (erosion, terraces...

- Repository: https://github.com/EL4CTEO/blender-skills (651 stars)
- Category: Engineering
- License: MIT
- Last updated: 2026-10-30
- Runs scripts: yes, review before use

## Install

Claude Code: `npx skills add EL4CTEO/blender-skills --skill blender-environment-kits -g -a claude-code -y`
Codex: `npx skills add EL4CTEO/blender-skills --skill blender-environment-kits -g -a codex -y`
Cursor: `npx skills add EL4CTEO/blender-skills --skill blender-environment-kits -g -a cursor -y`
Gemini CLI: `npx skills add EL4CTEO/blender-skills --skill blender-environment-kits -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add EL4CTEO/blender-skills`

## Description

Game environments in Blender 5.2 - terrain from noise or heightmaps (erosion, terraces, play areas, slope/height materials, 16-bit heightmaps + splat maps for UE/Unity), biome scatter by slope/height/mask with Poisson spacing, modular kit metrics and validation (grid, pivots, seams, texel density). Use for levels, landscapes, forests, modular buildings, dungeons.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# Environment kits

The execution model is in `blender-core`. Custom GN tools are in `blender-geometry-nodes`, materials in `blender-texturing` (trims, vertex blends), and mood/weather in `blender-time-of-day`/`blender-weather-fx`.

## One call each
```
scripts/terrain.py -- --size 400 --res 513 --height 60 --type ridged --erosion 30 --flatten 0 0 40 --material
scripts/terrain.py -- --heightmap //hm.png --size 1000 --res 1009 --height 120 --export-splat //T_Splat.png
scripts/scatter.py -- --target Terrain --collection Trees --density 0.02 --min-distance 5 --max-slope 25 --height-max 45
scripts/scatter.py -- --target Terrain --collection Rocks --density 0.05 --max-slope 70 --align 0.8 --name ENV_Rocks
scripts/kit_check.py -- --objects SM_Wall_4m SM_Floor_4m SM_Door_4m --grid 0.5 --fix
```

## Terrain (terrain.py)
- Grid of `--res`² verts over `--size` m. Use **2^n + 1** for Unity (513/1025/2049, `.raw` 16-bit LE) and UE Landscape's recommended sizes (505/1009/2017/4033, 16-bit PNG). Above 1025, tile it.
- `--type fbm` (rolling), `ridged` (mountains), `hills` (hetero terrain). `--scale` = feature size m. `--erosion N` = thermal erosion steps (talus 33°): slopes relax and debris fills valleys. `--terrace` m = stepped flats. `--flatten X Y R` = a level play/build area blended back with a smoothstep.
- Writes `ENV_Slope` (deg/90) and `ENV_Height` (0, 1) point attributes. `--material` builds grass/rock/snow from them: rock above 35°, snow above 75% height on slopes below ~40°, with noise-broken edges.
- Engines: `--export-heightmap` (PNG = 16-bit gray, `.raw` = 16-bit little-endian, row 0 = −Y edge; flip vertically in Unity if mirrored) plus `heightmap_z_scale_m` for the import Z scale. `--export-splat` = 16-bit RGBA weights (R grass, G rock, B snow, sum 1) for terrain layers. Both are written Raw (no display transform): measured round-trip error < 0.001.

The rest: https://github.com/EL4CTEO/blender-skills/blob/HEAD/skills/blender-environment-kits/SKILL.md