ChatGPT Image 2.5: Turn a Rough Sketch into a Photorealistic World
ChatGPT's Image 2.5 just dropped, and I expected another routine upgrade:
Sharper images, more stable characters, more accurate text rendering.
After a full run-through, though, I found one trick that really surprised me:
Scribble a rough sketch, then let Image 2.5 turn it into a photorealistic world.
And by "sketch," I mean something that requires zero drawing skills. It can be an absolute mess.
This post walks through the whole flow: how to open the canvas, how to draw, what to ask, and a prompt you can copy straight into the box. It's for two kinds of people:
- People who can see the picture in their head but can't describe where things go in words;
- People who find writing image prompts exhausting and want a more visual way to play.
One takeaway first: If you can't describe it, just draw it. The sketch controls the composition; the prompt controls the look.
📚 Table of Contents
- 01｜A Scribbled UFO Becomes Real
- 02｜Why This Trick Is So Good
- 03｜How to Do It in Three Steps
- 04｜One Trick, Any Subject
- 05｜One Sketch, Many Worlds
- 06｜Final Thoughts
01｜A Scribbled UFO Becomes Real
To test this, I didn't draw carefully. I just scribbled a few things:
- A crooked house
- An oval in the sky
- Two lines for light beams
- A stick figure
- A few trees that look like brooms
- A moon
The sketch is basically "a grade-school doodle."
But that's exactly what makes this trick fun.
Because next, I handed the sketch to Image 2.5 and told it:
Don't redesign the composition. Convert everything I drew into a real world.
Then… those few simple lines actually became a real-looking photo of a "late-night rural UFO sighting":
- The house stayed where it was;
- The stick figure became a villager standing in the yard;
- The oval in the sky became a huge craft;
- The two lines I scribbled became light beams shining down from the bottom of the UFO.
The key thing: it didn't just generate a new UFO picture. It tried to understand my sketch.
Those two are completely different. Let me explain why.
02｜Why This Trick Is So Good
In the past, image generation usually went like this: picture it in your head, then write a long prompt. For example:
Late night, a remote village in northern China, an old flat-roofed house, a huge UFO appearing in the sky…
The problem: words can describe what to draw, but they can't easily tell the AI where things go.
- Is the house on the left or the right?
- Where should the person stand?
- How big should the UFO be?
- Where should the light beams point?
Describing all of that in text makes the prompt messy very fast.
But there's another way now:
If you can't describe it, just draw it.
You barely even need to draw. Something like this:
moon
_______
/ UFO \
---------
| |
| |
🏠 person
🌲 🌲It doesn't matter that it looks bad.
The sketch tells the AI "I want this layout." The prompt tells the AI "turn it into this kind of world." Combined, you get way more control than typing text alone.
03｜How to Do It in Three Steps
The whole thing is three steps.
Step 1: Open the drawing tool
In ChatGPT, type @ in the input box and pick "Draw" (Canvas). A blank canvas opens.
Step 2: Scribble — don't polish
Quick strokes are fine. Honestly, I'd say don't draw it too carefully.
We're testing whether the model understands the basics: position, shape, size, and spatial relationships.
For the UFO example, all you need is "house + UFO + light beams + stick figure + trees." That's it.
Step 3: Hand it to Image 2.5
Now the important part — the prompt. The move isn't to say "make this real." It's to be explicit with the model:
Keep the sketch's composition. Only change the rendering.
Copy this prompt straight in:
Use my rough hand-drawn sketch as a strict reference and convert it into a photorealistic world scene.
Do not redesign the composition. Keep the rough position, proportion, and viewing angle of every object in the sketch.
The scene takes place in a remote village late at night.
Convert the house in the sketch into an ordinary old rural flat-roofed house with gray concrete walls, surrounded by dirt and weeds.
Convert the oval in the sky into a huge mysterious unidentified flying object.
Two white light beams shoot down from the bottom of the UFO, illuminating the ground and the dust and mist in the air.
Convert the stick figure in the sketch into an ordinary adult male villager, standing in the middle of the yard with his back to the camera, looking up at the craft.
This must NOT look like a Hollywood sci-fi movie poster. It should look like a real photo a panicked person snapped hastily with a phone.
Low-light phone photography, slight camera shake, motion blur, noise in the shadows, partially underexposed, slight overexposure around the light beams, no post-processing.
Do not add extra people, buildings, vehicles, text, watermarks, or UI.A few keywords here matter a lot.
1. Say "keep the original composition."
You must include "Do not redesign the composition." Otherwise the model will think "this drawing is ugly, let me redesign it for you." The result looks great but has nothing to do with your sketch — and you lose the whole point.
2. Don't chase "cinematic" looks.
A lot of prompts throw in cinematic, masterpiece, dramatic lighting, 8K, ultra detailed… It comes out pretty, sure. But there's a big catch: it screams AI-generated.
So this time I asked for the opposite — a normal phone shot, slight camera shake, noise in the shadows, partially underexposed, no post-processing. The result actually looks more like a real world.
04｜One Trick, Any Subject
At this point it hit me: the UFO is just one example. This trick extends everywhere.
Draw a round blob:
→ It becomes a seal pup lying on a beach.
Draw a few squares:
→ It becomes a realistic building.
Draw a crooked bedroom:
→ It becomes a realistic interior design render.
The whole mindset shifts. Before, it was I tell the AI what I want with words. Now it's I show the AI by drawing.
05｜One Sketch, Many Worlds
This is the part I want to keep exploring.
Same UFO sketch. The sketch doesn't change at all. Only the prompt does.
First round:
Convert it into a real photo shot on a 2026 smartphone.
Second round:
Convert it into a photo taken in 1997 by a villager with a film camera.
Third round:
Convert it into a documentary photo shot by a journalist on scene.
Same layout, totally different worlds. Honestly, this interests me more than plain text-to-image.
06｜Final Thoughts
When Image 2.5 dropped, everyone's first reaction was probably:
How much better is the image quality? Is it stronger than other models? How's character consistency?
Those are all worth testing.
But what interests me more than comparing specs is: can the new model unlock genuinely new ways to play?
"Ugly sketch → real world" is a great example. You don't need to know how to draw at all. In fact — the uglier the drawing, the bigger the contrast, and the more fun it gets.
Next I'm going to throw more absurd sketches at it: the seal pup, a giant mech, an unknown creature, a room design… let's see what Image 2.5 turns these scribbles into. If I get anything good, I'll write it up.
Using Image 2.5 needs a ChatGPT account that can generate images. No account yet, or want to upgrade to Plus / Pro for image generation? Check the ChatGPT top-up page for supported plans, payment methods, and delivery flow.