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Build a monster truck in R3, and let Claude make it drivable

2:24 · 2026-10-18

A monster truck you can drive, built in R3 with Claude: a terrain with random hills, gravel from a diffuse and a normal map, and a truck from Blender. Then Claude reads R3's vehicle docs and adds a chassis body, ballast and four wheels with suspension, a drive script, a cinematic camera with three modes and engine sound. Then a drive: chase, orbit and trackside. Narration: AI voice. The engine sound is the project's own two engine loops, mixed from the recorded drive.

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Chapters

  1. 0:00 A monster truck you can drive, built in R3
  2. 0:04 First, a terrain
  3. 0:11 Random hills, 250 metres across
  4. 0:21 Gravel: a diffuse map and a normal map
  5. 0:31 The truck, from Blender
  6. 0:41 Over to Claude: the physics
  7. 0:52 A chassis body, ballast and four wheels
  8. 1:03 A drive script: W, A, D and Space
  9. 1:14 A cinematic camera, three modes
  10. 1:20 Engine sound
  11. 1:26 The controls, in the help
  12. 1:29 A handbrake slide
  13. 1:34 Let's drive
  14. 1:44 Chase cam
  15. 1:56 Orbit
  16. 2:07 Trackside
  17. 2:18 Built in R3, made drivable by Claude

Transcript

0:00 Let's build a monster truck you can drive, right here in R3.

0:04 First, a terrain. You can add it by hand in the editor, but let's ask Claude.

0:11 Claude randomizes the hills and scales it up, about two hundred and fifty metres across, so there's room to drive.

0:21 Bare hills aren't much fun to drive on. So: gravel. A diffuse map for the colour, and a normal map for the bumps.

0:31 Next, the truck. It's a Blender model, so Claude drops it in and lifts it clear of the ground.

0:41 Now, Claude, please do the tricky parts. Set up the physics, a good centre of mass, and make it drivable.

0:52 Claude reads R3's vehicle docs first, then adds a chassis body, ballast down low, and four wheels with suspension.

1:03 It writes a drive script: W to go, A and D to steer, space for the handbrake.

1:14 Claude, make the camera cinematic, with three modes.

1:20 And some engine sound.

1:26 The controls end up in the help.

1:29 One more thing. A handbrake slide, so you can counter-steer.

1:34 Here's the help, under the question mark. The keys to drive, and the three cameras. Let's drive.

1:44 Chase cam.

1:56 Orbit.

2:07 And trackside.

2:18 Built in R3, made drivable by Claude.