The best experts in every field of 3D, teaching AI to get 3D right and to use their software.
Film, video games, engineering, robotics, chips, proteins. Harpoon brings together the professionals of each field to test your model, correct it and train it until they would rely on it themselves.
See the fields we cover- 1Linear keys: the ball moves at the same speed at the top and at the bottom.
- 2It never touches the floor. It turns around 6 cm above it.
- 3It stays perfectly round when it lands. No squash, no weight.
- 4Every bounce is as high as the first. It never loses energy.
Ask a model for a chair, a bracket or a bouncing ball and it answers in seconds. Open the file: the chair is nine meters tall, the bracket has a hole in the wrong place, the ball floats above the floor. The output looks done. Only a 3D expert can tell you it isn't right.
From a protein to a film shot.
3D is not one craft. A chip, a robot arm and a movie character are all built in three dimensions, and each has its own rules. For every field, Harpoon brings the people who know those rules, because they apply them at work every day.
Film and animation
Characters, rigs, animated shots, whole sets
Weight and timing, rigs that bend, shots that hold up on screen
Animators, riggers, layout artists
Visual effects
Explosions, fluids, smoke, destruction, digital doubles
Simulations that behave, scale that reads, shots that blend with live action
FX artists, simulation and compositing specialists
Video games
Real-time props, characters, levels and worlds
Polygon budgets, clean UVs, levels you can actually play through
Game artists, technical artists, level designers
CAD and engineering
Mechanical parts and assemblies
Dimensions to the tenth of a millimeter, holes, fits, parts that can be made
Mechanical engineers, CAD designers
Product and industrial design
Consumer products, packaging, furniture
Form, ergonomics, materials, a design a factory can produce
Industrial and product designers
Architecture and construction
Buildings, interiors, building information models
Real scale, structure, spaces people can live and move in
Architects, architectural visualization artists
Robotics and simulation
Robot models, joints, sensors, scenes robots train in
Joints and limits, collisions, physics a real robot would meet
Robotics engineers, simulation engineers
Chips and electronics
Circuit boards, chip packages, stacked layers
Layers, spacing, connections and heat paths in three dimensions
Hardware and packaging engineers
Proteins and molecules
Protein structures, binding sites, new molecules
Shapes that fold and fit, contacts that make physical sense
Structural biologists, computational chemists
Medicine
Organs from scans, implants, surgical models
Anatomy that matches the scan, implants that fit the patient
Medical imaging and 3D printing specialists
Digital twins, AR and VR
Factories, cities and spaces copied in 3D
Measurements that match the real place, scenes that run on a headset
Reality capture and XR developers
We teach AI to use the tools professionals use.
Every field has its own software, with its own menus, modes and habits. Agents that click, type and script inside these tools have to learn them the way a new hire does: by watching experts and practicing on real work.
- 01
Real tasks in real software
An expert writes the job the way a client would ask for it, in the software they use at work.
- 02
Experts show how it's done
We record professionals doing the task: every click, every shortcut, and why, said out loud.
- 03
Your agent tries, we score it
Your agent works in the same software. We check the file it leaves behind and every step it took.
Not just a file that opens. Work an expert would sign.
Shapes that are right
Real size, closed surfaces, clean geometry, parts that fit together. From a washer to a full chair, the model has to build what was asked.
- Dimensions and units
- Watertight meshes
- Topology a modeler would keep
Motion that feels alive
Characters and objects that move with weight and timing. Rigs that bend without tearing, a ball that slows as it bounces, a camera that follows the action.
- Keyframes and timing
- Rigs and weights
- Physics that behaves
Scenes that hold together
Sets, props, light and camera working as one shot, at the level a studio would accept, not a demo.
- Layout and staging
- Materials and light
- Final render
Good enough for real production.
Professionals will only use AI for 3D if its work fits their pipeline. So we don't grade it against a demo. We grade it against what a studio or a workshop would accept.
- Geometry you can build on
- Right size, closed surfaces, clean topology. A part an engineer can machine and a mesh an artist can edit.
- Files a studio can open
- Named objects, organized scenes, applied scale, nothing left behind. Ready for the next person.
- Motion with intent
- Timing, spacing, weight. The principles every animator learns, not just keys that move.
- Shots that hold up on screen
- Light, materials and camera that work together, rendered without artifacts.
From the first part to the final frame.
Real 3D work takes many skills. Each task goes to an expert who does that work for a living.
Three ways we make your model better at 3D.
Expert evaluation
Your model makes a part, a character, a shot or a scene. A professional opens it, scores it, compares it with another, marks every problem and fixes what matters.
- Scores with written reasons
- Preference pairs (A or B, and why)
- Located defects and corrected files
Tasks and benchmarks
Real 3D work written by people who do it, from one part to a full shot. Each task has an ideal solution and an automatic check that measures the result, for reinforcement learning and private tests.
- Tasks from one object to a whole shot
- Automatic checks, no guessing
- Private test sets your model has never seen
Training data
Clean, annotated 3D models, and recorded sessions of artists building and animating with every action and the reason behind it.
- Annotated parts, scenes, rigs and animations
- Artist sessions: screen, actions, reasoning
- Before and after files for every fix
Every output is opened and measured in real 3D software before anyone looks at it. How it works for labs
The software checks first. Then an expert.
- 01
Run and measure
Every script, file or agent session is run in clean 3D software. We measure what it really built, in seconds.
- 02
Expert review
A 3D professional looks at what a program can't judge, scores it and says why.
- 03
Fix and deliver
The outputs that matter are corrected. You get scores, comparisons and clean files.
Every expert passes a practical test in their field before they start and is scored on hidden test questions while they work.
Prompt: “Animate a rubber ball that bounces three times in two seconds, each bounce lower, then comes to rest.”
for f, z in keys:
ball.location.z = z + 0.06
ball.keyframe_insert(
"location", frame=f)for f, z, sq in keys:
ball.location.z = z
ball.scale.z = sq
key_bezier(ball, f)| Criterion | A | B |
|---|---|---|
| Script runs | ||
| Matches the request | ||
| Reads as real motion |
Every review becomes training data.
An expert doesn't just say “bad”. Each review is a structured record your team can train on directly.
- Scores on a rubric
- Each output is rated on what matters in 3D: does it build, does it match the request, does it look and move right.
- Defects, located
- Every problem gets a type, the exact object or line of code, and how to fix it.
- Preferences with reasons
- Which of two outputs is better, and a written reason a model can learn from.
- Corrected files
- The expert's fixed file or script, so you have the before and the after.
- Run records
- Software version, time to run, errors and what the scene contains after the run.
{task: "0412",area: "animation",output: "bounce_A.py",run: { software: "Blender 5.2", ok: true, seconds: 2.1 },scores: { runs: 5, matches_request: 2, motion: 1 },defects: [{ type: "no_contact", where: "ball, 6 cm above floor", line: 2 },{ type: "linear_timing", where: "all keyframes", line: 3 },{ type: "no_energy_loss", where: "bounces 2 and 3" }],preferred: "B",reason: "A floats and never slows: no weight.",fixed_file: "bounce_A_fixed.blend",reviewer: { skill: "animation", test_accuracy: 0.96 },}
Example record from the review above. Delivered as JSON, with the fixed files.
Real 3D work, graded by measurement.
Two benchmarks today: CAD parts and Blender scenes. The model's answer is run, and a check measures what it built against a reference, so results can't be faked by code that only looks right. For whole shots, an animator scores the rest.
Put your model on the benchStart with a small batch.
Send us a batch of parts, shots, scenes or scripts your model made. You get back scores, expert reviews and fixes, and you decide if it's worth going further.
Get in touchGet paid to teach AI 3D.
Artists, engineers, architects, roboticists and scientists who work in 3D. Remote, on your own hours, paid by the hour.
Find workBe at the center of 3D for AI: the experts, the benchmarks and the data behind every model that works in three dimensions, from the screen to the factory to the lab.
The reference benchmark for 3D
A public, expert-built measure of how well AI models work in 3D, field by field, from one part to a whole shot.
The best network of 3D experts
Artists, engineers, architects, roboticists and scientists, tested, scored and well paid.
The source of 3D training data
Evaluations, tasks and artist sessions that AI labs trust and train on.
- Today
Parts and scenes, skill by skill
- Expert evaluation of 3D models, scripts and agent sessions
- Harpoon CAD Bench and Harpoon Blender Bench
- Annotated 3D data from open collections
- Next
Characters, animation and whole scenes
- Animated shots scored by professional animators
- Full scenes, from layout to final render
- Recorded expert sessions in every major 3D software
- Then
Every field that works in 3D
- Robotics, chips, proteins and medicine, each with its own experts and checks
- A tool studios, engineers and labs use every day, beside their experts
- Anyone able to make what only specialists can make today