Thumbnail Generation Pipeline (v4 Locked)
Objective
Create a single unified YouTube thumbnail that fully occupies a 16:9 horizontal band with no wasted space.
Core Rules
- All important content MUST exist inside a 16:9 band
- Top and bottom outside the band MUST be empty
- No unused space inside the band
- Full edge-to-edge horizontal usage required
- No panels or segmentation
- One cohesive scene only
Text Requirements
- All required messages must appear
- Top row: spread across width
- Center: largest, dominant message
- Bottom row: spread across width
- No clustering
- No overlap that reduces readability
Density Requirements
- No empty sky or low-detail regions
- Background must be active and meaningful
- Every region contributes to urgency and clarity
Validation Checklist
- Crop top/bottom → image still complete
- All edges used horizontally
- All messages present
- No empty areas
Execution Prompt Template
Create a single unified YouTube thumbnail.
- Use a centered 16:9 band
- No important content outside the band
- Fill the band completely edge-to-edge
TEXT:
Top: [Message 1] + [Message 2]
Center: [Main message]
Bottom: [Message 3] + [Message 4]
Ensure:
- Full width usage
- No empty areas
- Strong visual intensity
- Clear readability