TUT-02
Design & Visual Assets•25 Minutes
Beginner
Generating 300 DPI Print-Ready Artwork with AI
How to Create High-Converting Merch Graphics with Gemini AI & Photoshop at Zero Cost
Why This Step Matters
Hiring a graphic designer can cost $300-$500 per design. Mastering structured visual prompts allows you to launch 10 fresh merch concepts every week with zero graphic design fees.
System Architecture & Flow
[Gemini Structured Prompt] ──► [High-Res Visual Generation]
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[Photopea / Photoshop Background Removal]
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[4500x5400px Canvas @ 300 DPI (sRGB)]
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[Lossless 24-Bit Transparent PNG]
Required Prerequisites Before Starting
- Google Gemini or SMB In-App AI Studio (/members/toolkit)
- Free browser-based photo editor (Photopea.com) or Photoshop
Step-by-Step Action Plan
1
Craft the High-Agency Merch Prompt
- •Open Google Gemini or SMB AI Creative Studio.
- •Prompt for high-contrast vector ink: 'Create a vintage 1990s grunge streetwear graphic illustration for an indie rock band named [Band Name]. Style: High-contrast monochromatic black and white ink line art, distressed textures, centered composition, isolated on a solid flat black background, no border, sharp vector-like edges.'
Copyable Action Prompt
Create a vintage 1990s grunge streetwear graphic for an indie band named [Band Name]. Monochromatic black & white ink, distressed textures, centered on solid flat background.2
Isolate Subject & Remove Background
- •Open Photopea.com (or Photoshop).
- •Load the downloaded image and select the Magic Wand tool (Tolerance: 20, Contiguous: Unchecked).
- •Delete the solid background color to reveal the transparent checkerboard.
3
Scale to Master 4500x5400px @ 300 DPI Canvas
- •Create a new document: Width 4500px, Height 5400px, Resolution 300 Pixels/Inch, Background Transparent.
- •Paste your isolated artwork and position in the upper-middle third (chest height).
4
Export Lossless Transparent PNG-24
- •Click File -> Export As -> PNG.
- •Confirm transparency is checked and save as [BandName]_Hero_Tee_300DPI.png.
Common Beginner Traps to Avoid
- ✕Using 72 DPI screen resolution (results in pixelated physical fabric prints).
- ✕Leaving a solid rectangular white/black box around the design.
- ✕Overcomplicating typography with unreadable 6-point micro-fonts.
Verification Checklist
- ✓Image generated with clean, isolated subjects.
- ✓Background 100% transparent (alpha channel).
- ✓Placed on 4500x5400px canvas at 300 DPI.
- ✓Exported as PNG-24 ready for Printify upload.