Hunyuan3D-2
D · Non-CAD Assetcomposite 23.1 [18.7, 28.2]p5 0.0IRT θ 0.0
Tencent· vv2.1 (text+image conditioned)· released 2025-08-20· Diffusion-3D· emits Mesh· open
Diffusion 3D model, image- or text-conditioned. Output is a high-poly mesh; we run an automatic remesh + STL export. Excellent on freeform and aesthetic surfaces, near-zero on GD&T and standards.
solid: agent · dashed: human baseline
PER-CATEGORY SCORE (95 % CI)
Geometric Primitives
75.8
Boolean Robustness
25.5
BREP Fidelity
33.5
Free-form Surfaces
60.7
Parametric Mechanical Parts
21.2
Assembly & Mating
8.0
Standards Compliance
5.1
Sheet-Metal Bodies
27.6
Sealing-Groove Design
17.7
Kinematic Mechanisms
7.7
DFM · 3-Axis CNC
14.1
DFM · Injection Mould
15.2
DFM · FDM 3D Print
18.5
CAM Toolpath Validity
14.9
Constraint Solving & Editability
4.3
Reverse Engineering
41.3
2-D Sketch Constraints
0.0
Functional Intent · FEA-Gated
17.4
Paraphrase Robustness
66.0
Confidence Calibration
13.1
MEAN METRICS BY LAYER
L1 · Geometry
| Category | Vol IoU | Chamfer | Hausdorff | NormCons | Watert. | Manif. | Euler | STEP RT | P@1 |
|---|---|---|---|---|---|---|---|---|---|
| Geometric Primitives | 0.483 | 0.173 | — | — | — | 0.921 | — | — | — |
| Boolean Robustness | 0.148 | — | — | — | — | 0.872 | — | — | — |
| BREP Fidelity | — | — | — | — | — | 0.850 | — | 1.029 | — |
| Free-form Surfaces | — | 0.133 | 0.684 | 0.881 | — | — | — | — | — |
L2 · Engineering
| Category | Dim RMSE | GD&T | FeatRec | Mating | Fit-Cls | Std |
|---|---|---|---|---|---|---|
| Parametric Mechanical Parts | 0.516 | 0.054 | 0.203 | — | — | — |
| Assembly & Mating | — | — | 0.203 | 0.092 | 0.005 | — |
| Standards Compliance | — | 0.056 | — | — | — | 0.046 |
| Sheet-Metal Bodies | 0.502 | — | 0.202 | — | — | — |
| Sealing-Groove Design | 0.515 | — | — | — | — | 0.046 |
| Kinematic Mechanisms | — | — | 0.204 | 0.093 | — | — |
L3 · Manufacturing
| Category | DFM | Draft | Min-Wall | CAM-Reach | Supp | Wall-Unif |
|---|---|---|---|---|---|---|
| DFM · 3-Axis CNC | 51.800 | — | 0.234 | 0.094 | — | — |
| DFM · Injection Mould | — | 0.090 | 0.229 | — | — | 0.136 |
| DFM · FDM 3D Print | 68.500 | — | 0.210 | — | 0.456 | — |
| CAM Toolpath Validity | — | — | — | 0.091 | — | — |
L4 · Cognition
| Category | ParamEdit | ConSolve | P-Range | FEA-σ | Para σ | Seed σ | Brier | EditLat |
|---|---|---|---|---|---|---|---|---|
| Constraint Solving & Editability | 0.047 | 0.045 | 0.038 | — | — | — | — | — |
| Reverse Engineering | — | — | — | — | — | — | — | — |
| 2-D Sketch Constraints | — | — | — | — | — | — | — | — |
| Functional Intent · FEA-Gated | — | — | — | 0.097 | — | — | — | — |
| Paraphrase Robustness | — | — | — | — | 0.049 | 0.087 | — | — |
| Confidence Calibration | — | — | — | — | — | — | 0.238 | — |
TASK-BY-TASK ARTIFACTS
PRIM-001Hollow cylinder (60 × 40 × 100)0.4730.00PRIM-007Right hexagonal prism with pitch fillet0.5930.00BOOL-003Coplanar-face union (knife-edge stress)0.0620.00BOOL-009High-genus subtraction (lattice block)0.1330.00BREP-004NURBS-handle goblet (G2 swept loft)0.0000.00SURF-002Compressor blade (NACA 65-(12)10)0.5790.00MECH-014L-bracket with M6 + slotted hole0.0000.00MECH-022Stepped shaft with retaining-ring groove0.0660.00MECH-027Planetary-gear carrier plate0.0810.00ASM-005Pin-in-hole, H7/g6 sliding fit0.0000.00ASM-011Dovetail slide (60° flanks)0.0320.00STD-002ISO 4762 M8×30 socket-head cap screw0.0000.00SHEET-003U-channel bracket, 1.5 mm Al, k=0.400.1180.00SEAL-001AS568-214 face-seal groove0.0070.00KIN-002Four-bar linkage, Grashof crank-rocker0.0000.00DFMCNC-0023-ax-machinable manifold block0.0190.00DFMMOLD-002Injection-mouldable enclosure half0.0000.00DFMFDM-008FDM-printable hinge (no support)0.0000.00CAM-0015-pocket plate, Ø3 endmill finish0.0000.00PARAM-006Editable flange (bolt circle param sweep)0.0350.00PARAM-013Editable bracket (length+30 %, hole→M8)0.0000.00REVENG-002Three-view ortho → bracket0.5730.00REVENG-009Three-view ortho → housing with cores0.4700.00SKETCH-003Tangent-arc transition profile0.0000.00FUNC-001Cantilever bracket — 250 N tip load, 6061-T6, SF≥40.0000.00FUNC-007Heat-sink fin array for 25 W TO-2200.0000.00PARA-0015× paraphrased L-bracket0.5810.00CAL-003Confidence-calibrated planetary carrier0.0000.00PRIM-002Sphere with planar cap0.5980.00PRIM-003Right truncated cone (frustum)0.4220.00PRIM-004Square-base pyramid frustum0.4170.00PRIM-005Tilted-axis box (30°)0.4340.00PRIM-009Hollow torus (Ø100 mean × Ø8 tube, 1 mm wall)0.4430.00BOOL-001Tangent cylinder onto cube (line-of-contact)0.2310.00BOOL-002Two interpenetrating spheres (lens intersection)0.1920.00BOOL-005ε-offset extrusion (sliver-face stress)0.1240.00BREP-001Periodic-spline cylinder (closed in U)0.0000.00BREP-002G1-only loft (tangent discontinuity)0.0000.00BREP-007Trimmed sphere with hole through pole0.0000.00SURF-001Ergonomic mug handle (revolved spline)0.0000.00SURF-007Mouse top-shell (Class-A)0.7440.00MECH-002Bearing block — two 6204 deep-groove bearings0.0850.00MECH-005Cam-follower lever (eccentric pivot)0.1610.00MECH-018Heat-set insert boss array (4× M3)0.0720.00MECH-031Threaded cap with diamond knurl0.0950.00ASM-001Threaded coupling M16×1.5 (male+female pair)0.0000.00ASM-008Spline shaft + hub (DIN 5480 W25×1.25×18)0.0120.00ASM-013Bayonet quarter-turn mount0.0000.00STD-001ISO 7050 self-tapping screw ST4.2 × 160.0500.00STD-005ISO 8734 dowel pin Ø6 m6 × 300.0000.00STD-008ASME B18.6.3 button-head 1/4-20 × 5/80.0000.00SHEET-001Box-pan with corner relief cuts0.1090.00SHEET-0073-bend electronics chassis0.1040.00SEAL-004AS568-218 piston-type radial groove0.0000.00SEAL-007ISO 3601-2 quad-ring face groove0.0000.00KIN-005Geneva drive — 4 station0.0000.00KIN-008Planetary gearset full mesh (sun + 3 planets + ring)0.0000.00DFMCNC-0054-pocket plate, R 0.5 internal corners0.0000.00DFMCNC-009Long-aspect bracket (vise-fixturable)0.0620.00DFMCNC-0135-axis-only fish-mouth saddle0.0000.00DFMMOLD-005Telephone handset shell0.0000.00DFMFDM-002Bridge-test calibration cube0.0000.00DFMFDM-011Print-in-place hinge0.2720.00CAM-005T-slot pocket array (Ø 8 + Ø 4 endmills)0.0140.00PARAM-009Configurable bottle (height + cap params)0.0000.00REVENG-005ABC dataset stepped pulley (multi-view)0.6100.00SKETCH-014Symmetric four-bar profile0.0000.00FUNC-003Heat-sink for 60 W CoB LED0.0000.00PARA-0055× paraphrased planetary carrier0.4430.00CAL-007Confidence-bracketed mounting flange0.1270.00