environment-kit

Environment Kit — Style-Locked Modular Pieces

A kit is a family of meshes — wall, floor, door, pillar, corner, arch — that the level designer snaps together to build interiors and exteriors. The skill exists to solve one specific failure mode: generating each piece with a fresh prompt produces six pieces that look like they came from six different games. The fix is the style anchor pattern — generate one piece first, lock its prompt suffix, and reuse that exact suffix for every subsequent piece.

The backing tool is onyx_generate_3d, called multiple times. Each call costs ~$0.50, so a 6-piece kit is ~$3 and ~5 minutes. Confirm scope before starting.

When to use

• "Build me a dungeon kit — walls, floor, door, pillar."
• "I need modular wall pieces for a sci-fi corridor."
• "Make a tileset for a wooden tavern interior."
• "Generate the pieces for a stone temple — I'll assemble the level."
• The user wants to build a level out of repeating, snapping pieces.

When NOT to use

• A single hero prop (single chest, single throne) → onyx:3d-assets/prop-model.
• Open-world terrain (rolling hills, forests) → use a heightmap + scattered organic models from onyx:3d-assets/organic-model.
• Repeating flat surfaces only (just walls and floors, no decorative pieces) → onyx:asset-pipeline/asset-strategy Pipeline 2 (textures + CSG) is cheaper and snaps perfectly to grid.
• Characters or vehicles in the scene — those are separate skills.

The style anchor pattern

This is the whole skill. Get this right and the kit looks unified. Get this wrong and you waste $3.

1. Generate the anchor piece first. Pick the most visually defining piece — usually the wall or the door. Iterate the prompt until the user approves it visually.
2. Extract the style suffix. Everything after the object description. Example anchor prompt:

   A stone dungeon wall section, mossy granite blocks with iron reinforcements, 
   torch-bracket sconce, weathered surface. Game asset, centered, stylized 
   low-poly game art, warm torchlight palette, white background, isolated object.
   

   The suffix to lock is everything from Game asset, ... onward, plus mossy granite blocks with iron reinforcements, weathered surface, warm torchlight palette — the material + palette tokens.
3. Reuse the suffix verbatim for every other piece. Only change the object description at the front.