Transparent Cutout Cleanup
Use when removing backgrounds from generated sprites to get clean alpha edges with no halo, fringe, or leftover background pixels.
Install
$ agentstack add skill-0xheycat-isometric-game-skills-transparent-cutout-cleanup ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-0xheycat-isometric-game-skills-transparent-cutout-cleanup) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
Transparent Cutout Cleanup
Overview
AI-generated sprites come on a background. Naive removal leaves a colored halo or jagged edge that screams amateur when tiles are placed together. This skill produces clean, premultiplied-safe alpha cutouts.
When to Use
- Any generated sprite needs a transparent background.
- Placed sprites show a white/gray halo or fringe.
- Edges look jagged or have leftover background color.
Process
- Generate on a PLAIN flat background (easier to key out than a busy one).
- Use a background-removal model (e.g. InSPyReNet / rembg) rather than a hard color key.
- Inspect edges at 400% zoom for halo or fringe pixels.
- Defringe / decontaminate edge color so no background tint remains.
- Erode the alpha by 1px if a faint halo persists.
- Save as PNG with straight alpha; verify on both light and dark backgrounds.
- Batch the cleaned sprites for the atlas packer.
Pair this with the ComfyUI rembg node in seamless-isometric-terrain/scripts.
Rationalizations (Stop Lying to Yourself)
| Excuse | Reality | |---|---| | "A white halo is barely visible" | On a dark tile it is glaring. Defringe every sprite. | | "Hard color-key is faster" | It eats anti-aliased edges and looks jagged. Use a proper matting model. |
Red Flags - STOP if you catch yourself:
- Visible halo/fringe when placed on a contrasting background.
- Jagged, aliased cutout edges.
- Background color contaminating semi-transparent pixels.
Verification
You are NOT done until every box is checked:
- [ ] Edges are clean at 400% zoom on light AND dark backgrounds.
- [ ] No background-color contamination on semi-transparent pixels.
- [ ] All sprites exported as straight-alpha PNG.
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: 0xheycat
- Source: 0xheycat/isometric-game-skills
- License: MIT
- Homepage: https://0xheycat.github.io/isometric-game-skills/demo/
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.