Design

Blocky Thumbnail

Make a text-free blocky 3D picture and add a two-line outlined title with Python for a 1280x720 thumbnail.

Free · No sign-up · Updated 2026-10-27 · By sphereai.work💻Install Claude Code (or Codex, Antigravity) firstThis skill runs best in VS Code with Claude Code, Codex or Antigravity.How to install →

Works with Claude, GPT and GeminiInstall any one of them in VS Code →ClaudeClaude CodeGPTCodexGeminiAntigravity

How to use

1
Download the ZIP
Get the skill file with the button below. No sign-up.
2
Unzip and open
Unzip it into a folder and open that folder in VS Code.
3
Just ask
Tell your AI agent ‘Run the automation pipeline in this folder’.

When to use it

You need a thumbnail for a blocky science video
The title covers the main subject
Your thumbnails all look the same

Try saying

“이 편 썸네일 만들어줘”Make a thumbnail for this episode

“썸네일 글자 위치 바꿔서 다시 얹어줘”Move the title and add it again

What you get

01How to pick a text-free scene
02Two-line title rules and placement
03A pre-upload checklist

Tips

Pick one moment that sums up the episode, not a summary.
Check it is readable at 160x90.

Get it free now

No sign-up, just one ZIP. Edit it freely for personal or commercial use.

Download ZIP (1KB)

Installation

Claude.ai / Desktop app (ZIP upload)

Download the ZIP below.
Upload it under Settings → Capabilities → Skills.
Turn the skill on and start a chat with one of the "Try saying" lines.

Claude Code (copy the folder)

Unzip it. You'll get a folder named after the skill.
Put that folder inside ~/.claude/skills/ (or .claude/skills/ for a single project).
Restart Claude Code.

Menu names may differ slightly depending on your environment. If you can't see the menu, check that skills are enabled on your plan.

Files and preview

Included files

SKILL.md
README.txt

Preview of SKILL.md

---
name: blocky-thumbnail
description: 1280x720 thumbnail for a blocky 3D video: a strong text-free scene with room for the title, then two outlined title lines drawn with Python. 블록 스타일 썸네일.
---

# Blocky Thumbnail

## 1. The picture (no text in it)
- Render the strongest shot of the episode in Blender at 2560x1440, or make a blocky 3D picture with an image tool.
- Leave an empty area for the title.
- Pick the moment, not a summary: one subject, big, readable at phone size.
- Never use a game's official characters, logos or textures.

## 2. The text
Two short lines:
- Line 1 (white): the premise in a few words.
- Line 2 (yellow): the hook or a number.

Draw it with Python (Pillow):
- Bold or pixel font with an open licence, thick black outline, no box behind it.
- Put it in the empty area with a margin from the edge.
- Output 1280x720 JPG plus a text-free copy.

## 3. Checks
- [ ] The text does not cover the subject's face or the key object.
- [ ] Readable at 160x90 (look at a scaled-down copy).
- [ ] Different from your previous thumbnails in colour and layout.
- [ ] The promise matches the video.

## Output
`<title>_thumbnail.jpg` (1280x720), the text-free copy and the original picture.

---
만든이: sphereai.work (https://sphereai.work)