Isometric object sprites
Skill 0xheycat/isometric-game-skills/skills/isometric-object-sprites
Agent-ready toolkit for isometric games: ComfyUI art pipelines, seamless terrain, sprites, grid math, Canvas2D rendering, pathfinding, and asset automation.
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Use when generating isolated isometric props (trees, rocks, bushes, stumps) that drop cleanly onto tiles with correct scale and a transparent background.
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SKILL.md
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Isometric Object Sprites
Overview
Objects are sprites that sit ON tiles, not tiles themselves. They must be isolated on a plain background, share one scale, and have a defined ground-anchor so depth sorting works later. This skill produces clean, consistent props.
When to Use
- You need trees, rocks, bushes, fences, or other decorative props.
- Props look different sizes or styles when placed together.
- You need transparent, drop-in-ready object sprites.
Process
- Confirm art direction is locked (see
isometric-art-direction). - Prompt ONE object per image, isolated on a plain flat background, with a soft contact shadow.
- Keep the surface/style phrase SHORT - long prompts add unwanted props and edges.
- Use a FIXED seed and identical settings across the whole object set for scale consistency.
- Generate, then send to
transparent-cutout-cleanupfor clean alpha edges. - Define the ground-anchor (bottom-center of the footprint) for each sprite.
- Place 3 objects on a test tile to confirm scale and anchor before scaling up.
Prompt template:
single isometric [object], 2:1 isometric view, soft painterly shading,
simple clean composition, isolated on plain flat background, soft contact shadow,
game asset, high quality
Rationalizations (Stop Lying to Yourself)
| Excuse | Reality |
|---|---|
| "I can generate several objects in one image to save time" | Then you cannot place them individually and scales drift. One object per image. |
| "Scale looks close enough" | Close enough reads as broken in-game. Fix the seed and settings. |
Red Flags - STOP if you catch yourself:
- Multiple objects crammed into one generation.
- Inconsistent scale across the prop set.
- Leftover background fringe because cleanup was skipped.
Verification
You are NOT done until every box is checked:
- Each prop is a single isolated sprite with transparent background.
- All props share one scale and style.
- Each sprite has a defined ground-anchor and passes a placement test.