This SECRET Gemini 3 Flash Prompt Makes AI Design 100x Better

???? Google's AI Studio team just gave away something they probably shouldn't have. Flash UI generates stunning, high-fidelity UI components with a simple two-part prompt system.
This comes from Amaresi, Lead Product + Design at Google AI Studio. And honestly, I think this reveals how they actually built Stitch.
⚡ What makes Flash UI special:
→ Physical/material metaphors drive the design (obsidian, bioluminescent, kinetic)
→ Two-part prompt: First generates the concept, second generates the code
→ Results look incredible even with Gemini 3 Flash (not Pro)
→ You can grab the code and use it to build entire websites
???? The prompt structure revealed:
→ Part 1: Generate creative design concepts with evocative names
→ Part 2: "You are Flash UI" - detailed instructions for CSS, typography, motion, layout
→ Uses metaphors to drive every CSS choice
→ Includes streaming for real-time generation
???? What you can do with this:
→ Copy the prompt system and improve it (generate 6 options instead of 3)
→ Add Nano Banana for image generation
→ Take one component's style and build a full SaaS homepage
→ Create your own design system in minutes
I tested taking one login form style and asking Claude to build a full SaaS homepage. Then tested the same with Gemini 3 Flash. Flash actually won.
This might be the new way to do UI/UX. It's even better than skills.
???? Find it: AI Studio → Build → Flash UI

Keywords
google flash ui, ai studio flash ui, gemini 3 flash ui, ui ux ai, google ai studio tutorial, flash ui prompts, ai generated ui, design system ai, gemini ui generation, google stitch secret, ai studio build, ui design prompts, gemini 3 flash design, two part prompt, ai ux design, google ai design, flash ui code, ai homepage design, material design ai, css ai generation

Hashtags
#flashui #googleai #aistudio #uidesign #uxdesign #gemini #aitools #webdesign #designsystem #aidesign #frontend #css #coding #techtuorial #googlestitch #artificialintelligence #webdevelopment #promptengineering #designtips #freetool

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00:00 - I Found Something Incredible in Google AI Studio
00:29 - Demo: Futuristic Login Form with Flash UI
00:48 - Harbor SEO Sponsor Break
02:30 - The Design Names Are Amazing (Physical Metaphors)
03:03 - Grab the Code and Use It Anywhere
03:32 - Looking at the Actual Prompts (This is Gold)
04:05 - The Two-Part Prompt System Explained
04:44 - This Might Be How They Built Stitch
05:35 - I Need to Copy This Before They Take It Down
06:21 - Flash UI Location in AI Studio
06:52 - Testing: Full SaaS Homepage from One Component
07:34 - Build an Entire App from This Design System
08:34 - Gemini 3 Flash vs Claude: Same Prompt Test
09:00 - Holy... Flash Actually Won