How to check an AI-generated 3D rig

A rig is useful when the right surfaces move around the right pivots. A high joint count or a successful export does not establish that on its own. Use a few deliberate tests before committing an AI-generated asset to a project.

Check the geometry first

Rotate the unposed model through a full turn. Look for missing surfaces, floating fragments, unexpected holes and limbs fused to the body. Count the appendages you intended to create. Check thin structures such as antennae, fingers and propeller blades from more than one angle.

If the mesh itself is incomplete, a skeleton cannot repair that missing anatomy. Return to the generation stage. Save a copy of any result you want to preserve before trying another version.

New Bake3D generations check the delivered triangle scene before accepting it. With analysis enabled, the Source geometry panel also compares the input image with seven mesh views: front, back, both sides, top, bottom and three-quarter. Open the inspection image to examine a suspected cut, missing appendage or fused moving part. A flat panel can legitimately disappear edge-on; a stylized creature can legitimately have unusual anatomy. Compare against your actual reference and intended use.

A high-confidence visual finding supported by both the reference and mesh views can trigger one recovery candidate within the same generation job, without another user credit charge. The candidate replaces the original only when the comparison favors it. Both valid meshes remain available to download in the panel. If recovery fails or looks worse, the original stays selected. Download links preserve the two source files; they do not switch an existing rig to another mesh.

This review is advisory, and unavailable or ambiguous comparisons do not establish correctness. It cannot reconstruct unseen surfaces with certainty. The panel also reports lossless file-packaging adjustments, such as correcting a texture’s media type. Those adjustments preserve the encoded pixels and geometry; they do not remodel the subject.

Inspect the pivots and hierarchy

A knee should bend around the knee, and a wheel should rotate around its axle. Body parts that need independent movement need distinct joints or chains. The hierarchy should follow the physical relationship: rotating a parent carries its children, but rotating one child should not drag an unrelated part.

For long flexible appendages, inspect the full chain from root to tip. Eight tentacles should not become two chains that accidentally connect unrelated arms. For machines, distinguish a physical body joint from a control handle that has no surface of its own.

Rest pose matters. A raised leg is not automatically misplaced, and a hanging or swimming creature does not necessarily have feet on a floor.

Test skin weights with isolated movement

Move one part at a time, initially through a modest angle. Look at the joint and its neighbours. Watch for stretching, collapse, tearing, detached surfaces or motion leaking into the opposite limb.

For rigid parts, watch the shape as well as the pivot. A wheel or panel should retain its dimensions while rotating. For organic parts, a smooth bend is usually more useful than a hard hinge. Mixed soft and mechanical structures deserve extra scrutiny because one material setting may not suit the whole object.

Bake3D’s rig-check image helps reveal these problems, but a numeric score and an AI critique are diagnostic aids. Inspect the actual deformation yourself.

Read the measured deformation report

New Bake3D rigs include a surface measurement from four role-driven diagnostic poses. The report shows how much of the original surface exceeds 3× extension or falls below 0.1× compression, together with the tested joint and triangle counts. It weights the result by surface area, so adding more triangles to one patch does not automatically make that patch dominate the percentage. A correctly rigid part can rotate without being counted as stretched.

When more than 0.5% of the surface exceeds these limits, the server correction loop can revisit the joint plan within its existing attempt limit. The report identifies involved skin influences, and the saved comparison shows the most affected diagnostic pose. Use those regions as inspection starting points. They do not prove which joint caused the problem, and a small percentage can still contain a visibly poor bend in an important detail.

The placement score, visual opinion and surface measurement answer different questions. A placement score of 100 does not establish good deformation. An older rig, or one without a supported articulated test pose, may have no measurement. These stress poses do not establish anatomical limits, detect every collision or validate every motion you might create; continue with the intended animation below.

Review a complete motion cycle

Play at normal speed, then inspect the fastest and most extreme frames. For locomotion, watch foot plants, slipping and sudden body-height changes. For a loop, compare the end with the beginning. For an object with several moving parts, make sure unrelated parts stay stable.

Use a simple action as a baseline before adding several motions together. If a motion references joints the rig does not contain, choose a compatible action or correct the rig rather than expecting the engine to invent the missing controls.

For standing rigs with two or more separate leg chains, Walk · fit to this rig measures a common stride from limb reach and staggers footfalls across all resolved legs. In MCP or the API, export with presetId: "adaptive-walk". Explicitly hanging, seated, swimming or flying rest poses need a different action. Wheels and rigid panels also need their own motions.

Review the full cycle with travel enabled: a planted foot should stay in the same place on the floor while the body advances. Check every leg, including an odd or rear-mounted limb. Then export an in-place clip if your game controller will supply movement. Matching the controller’s speed to the clip remains necessary. This preset produces a geometric gait; it does not simulate balance, collisions or terrain, and it does not repair a poor rig or fused mesh.

Verify the exported file

Import the final GLB into the target editor. Check the same motion there, because shading and skinning implementations can differ. Confirm that all mesh parts, material assignments, UV sets, textures, bones and clips survived the transfer.

A glTF validator checks file structure and conformance. It does not judge whether a creature walks naturally. Use structural validation and visual review together.

See the Blender import guide and our validation approach for reproducible examples and current limits.