Turn a Drawing Into a Real Racing Game

What you need

Draw the car and photograph it

The AI can only build what it can see. Everything the game gets wrong later usually starts here.

Drawing it

• Draw the car from the side, or at a three-quarter angle. Not from the front — the AI gets almost no shape information from a front view.
• Use a clean page with no other doodles on it.
• Bold outlines. Thin pencil lines disappear in the photo.
• Colour it in if you want that colour in the game. A blank outline gives the AI free rein.
• Keep it simple: body, windows, wheels, a spoiler if you want one. Tiny details get lost.

Photographing it

• Shoot straight down, directly above the page. No angle.
• Bright, even light. Watch for your own shadow across the paper.
• Fill the frame with the drawing.

Connect Higgsfield to ChatGPT

You do this once. If Higgsfield already shows up in your ChatGPT apps list, just switch it on and skip to Step 3.

• In ChatGPT, open Settings → Apps & Connectors → Advanced and turn on Developer mode. On a Business or Enterprise workspace an admin has to allow this first — that is the usual reason the option is missing.
• Back in Apps & Connectors, choose Create (or "Add custom connector").
• Name it Higgsfield and paste the server URL: https://mcp.higgsfield.ai/mcp
• Pick OAuth for authentication — ChatGPT usually detects it on its own — and sign in with your Higgsfield account.
• Start a new chat and enable Higgsfield in the tools menu of the message box. It has to be switched on per conversation.

Upload the photo

Do not just drag the photo into the chat. ChatGPT attachments are not visible to Higgsfield — it needs the file uploaded to its own storage. Ask for it directly:

I want to use a photo of a car I drew. Open the Higgsfield
upload widget so I can select the file.

An upload panel opens, you pick the photo there, and it confirms. From that point Higgsfield can work with the image.

Turn the drawing into a 3D car

This is the step that makes it your car instead of a generic one. Two parts, both in the same chat.

First, clean up the sketch into a proper car render

Using the photo I just uploaded as the reference, generate a
clean 3D-style render of this exact car:

- Keep the same silhouette, proportions and colour as my drawing
- Side-on view, plain neutral background, no shadows
- Glossy arcade game-asset look, clean edges, no text or logos
- Full car visible, nothing cropped

Then convert that render into a 3D model

Now turn that render into a 3D model (GLB) with texture,
so I can use it as the player car in a game.

Build the game

Here is the whole prompt. The detail is the point: a vague prompt gets you a grey box on a grey road.

Build me a browser racing game using the 3D car model we just
made as the player vehicle.

SETTING
Night-time Tokyo. Neon signs in Japanese, rain-slick asphalt
reflecting the lights, elevated expressway with the city
skyline behind it, vending machines and street lamps along the
roadside. Moody, saturated, arcade-style — not photorealistic.

CONTROLS (arrow keys only)
- Up arrow: accelerate
- Down arrow: brake, then reverse
- Left / Right arrows: steer
- Spacebar: handbrake for drifting
- R: restart the run

CAMERA
Third-person chase camera behind the car. It leans into turns
and pulls back slightly as speed increases.

GAMEPLAY
- A looping circuit through the city, roughly 60-90 seconds
  per lap, with a mix of long straights and tight corners
- Lap timer and best-lap time saved for the session
- Checkpoints along the track that show a split time
- Barriers on both sides so the car cannot leave the road
- Slight slowdown on wall contact instead of a hard crash
- A few AI cars driving the circuit as opponents

FEEL
Weight and momentum: the car takes a moment to reach top speed
and slides a little in fast corners. Engine sound that rises
with speed, tyre squeal on drifts.

HUD
Speed in km/h, current lap time, best lap, lap counter.
Clean and minimal, bottom corners of the screen.

FIRST SCREEN
A title card with the game name, my car on display, and
"Press UP to start". Show the controls on that screen.

Deploy it and give me the live URL.

Play it, then fix it

You get a real link you can open on any browser and send to anyone. The first version is almost never right — that is normal, and fixing it is just more chat:

• "The car is too slow, double the top speed and make it accelerate faster."
• "The turns are too sharp, make the steering smoother."
• "Add more neon and more rain."
• "The camera is too close, pull it back."

Things that go wrong

Quick checklist

• Drew the car from the side with bold lines on a clean page
• Photographed it straight down in good light
• Enabled developer mode and added the Higgsfield connector in ChatGPT
• Switched the connector on inside the chat
• Uploaded the photo through the Higgsfield upload widget
• Generated the clean render, then the 3D model
• Built the game with the full prompt and got a live URL
• Played it, asked for fixes, deployed again