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A Single Photo Can Now Simulate All of Seoul
2026.03.19A research team just cloned all of Seoul using AI. A spec ad was shot without a single camera. And there's a new tool that kills AI writing slop. Here's what's happening today.
🔥 One Photo Simulates an Entire City's Streets
AI generating imaginary worlds? Old news. But simulating an actual existing city from scratch? That's a first. A joint team from Naver and KAIST just published the 'Seoul World Model.'
They trained on 1.2 million panorama images from Naver Maps, generating video that lets you freely roam Seoul's streets at a scale of hundreds of meters. You can change the camera angle, and text conditions like 'rainy Seoul' actually work.
Around the same time, OpenArt dropped a feature called 'Worlds.' Upload a single photo and it generates an explorable 3D world. AI is moving past flat images and starting to build spaces themselves.
The Seoul World Model racked up over 1,400 likes on X. Since it clones a real Korean city with AI, the potential for autonomous driving simulation, urban planning, and game environment generation is huge.
Plenty of services already create imaginary worlds, but replicating reality based on actual city data is a completely different level. This tech has real applications in self-driving simulation and film location scouting, which makes what comes next worth watching.
📌 3 More Stories Today
1️⃣ Nano Banana Pro + Kling 3.0 Made This Ad. Seriously?
AI creator @AllarHaltsonen on X dropped a spec ad called "Before The Sunrise." The workflow: images with Nano Banana Pro, then animated with Kling 3.0. It all started from a single vintage image made in Midjourney.
Creators are saying 'this combo is good enough for client-ready pitches.' The whole thing took about a week to produce.
Both Nano Banana Pro and Kling 3.0 are available on Carat right now. Generate an AI image and turn it into video, all in one place.
2️⃣ Google Stitch: Say It and the App UI Appears
Google is rolling out a major upgrade to its AI design tool 'Stitch.' The standout feature is a live voice mode for designing UI. Say "show me 3 menu options" or "change the color palette" and it updates in real time.
It supports 3D workspaces, auto-generates React apps, and exports to Figma. Google is creating a new 'vibe design' trend. Carat also offers mini app generation, and this kind of 'design by talking' workflow is becoming the norm fast.
3️⃣ New Tool Auto-Kills Those Obvious AI Writing Patterns
AI-written text has a certain 'sameness' to it. Same structures, same phrases, same endings. People call it 'slop,' and now there's an open-source tool that auto-detects and removes it.
It's called 'UNSLOP,' built by Matt Shumer, a developer active in the AI agent space. Tell it something like 'remove the slop from this landing page' and it analyzes hundreds of sites to find repeating AI patterns, then generates a skill file so those patterns don't come back.
The kicker? Bookmarks outnumber likes by 1.6x, meaning a lot of people saved it for later use. If you're a creator or marketer who uses AI regularly, this one's worth a look.
🧪 Prompt Tip of the Day
From Zero to Viral: 10 Short-Form Prompts
A post on X condensed what short-form content coaches charge $5K-$10K for in 30-day programs into 10 AI prompts. It got 1,032 bookmarks. When bookmarks beat likes, that many people are planning to actually use it.
You can use these exact prompts on Carat. We adapted 3 of the best ones below. Copy and try them right away.
Prompt 1: Find Your Niche Channel Concept
"I'm an AI video creator. Give me 5 short-form channel concepts that work in my market. For each:
- Channel name
- Target audience
- Core content format (30s/60s)
- First 10 video topics
- Differentiation point
Pick niches with low competition but high view potential."
Prompt 2: Viral Script Generator
"Write a 60-second short-form script on this topic: [enter topic]
Rules:
- Hook in the first 3 seconds (question or shocking fact)
- One twist in the middle
- Tease the next video at the end
- Tone that resonates with 20-30 year olds
- Subtitle-friendly: keep each line under 8 words"
Prompt 3: 30-Day Content Calendar
"Build a 30-day content calendar for an AI video creator.
- 5 uploads per week
- Mon/Wed: trend reaction videos
- Tue/Thu: tutorials
- Fri: behind-the-scenes/vlog style
- Include title, hook opening line, and core keyword for each
- Reflect current trending keywords"
The key to these prompts is setting specific constraints. Not just 'write me a script' but '3-second hook, 8 words per line, tone for 20-30 year olds.' The tighter the conditions, the better the output.
You can use these prompts directly on Carat. Pair them with web search and it'll auto-pull the latest trending keywords for even better results.
That's all for today. Give those prompts a try. 🤗