Automated Geometry & Spec QA: Enforcing Delivery Gates with glTF-Transform & Khronos Validator
Why do models that "look fine by eye" still get rejected by client engines due to broken accessors, NaN normals, or oversized textures?
Visual inspection cannot catch binary buffer out-of-bounds errors, zero-length normals, unindexed geometry, or polygon counts that exceed contract caps by 5%. VECTOR’s delivery layer runs `glTF-Transform` and the official `Khronos glTF Validator` to enforce automated Quality Gates that block non-compliant deliveries.
The method: three small steps
Automated QA enforces two strict gates: 1. **Khronos Specification Gate**: validates JSON schema, buffer byte alignment, unit-length normals, and material indices (`errors === 0`); 2. **Contract Budget Gate**: extracts exact vertex count, triangle count, material slots, texture dimensions, and metric bounding box via `glTF-Transform`—setting `deliveryBlocked = true` if any hard constraint fails.
Run Khronos glTF Validator for binary and schema compliance
Scan for non-unit normals, out-of-bounds indices, invalid skin weights, and broken buffer views, requiring `numErrors === 0`.
Extract exact geometry and texture metrics via glTF-Transform
Compute exact vertex counts, triangle counts, draw calls, material slots, texture resolutions, and 3D bounding-box dimensions.
Evaluate against RequirementContract hard constraints to block or release
Compare measured metrics against the `RequirementContract`; automatically set `deliveryBlocked: true` if any hard constraint or validator error fails.
In the glTF Automated Quality Gate Lab below, run `Khronos Validator` and `glTF-Transform` checks on Aegis Vanguard (eb3a0980).
glTF-Transform & Khronos Delivery Quality Gate
Aegis Vanguard (eb3a0980) is queued for delivery. Contract hard constraints: Triangles ≤ 60,000, Textures ≤ 4096px, Khronos Validator Errors = 0.
Switch to the recommended VECTOR controlled pipeline option to resolve topology, UV, or QA gate errors.
Use human eyes for aesthetics and automated validators for spec compliance; unlock final delivery only when Khronos errors equal zero and all budget gates pass.
Run it in the VECTOR 3D workbench or Blender pipeline
- Open a matching reference asset in the VECTOR 3D workbench or your Blender + AI pipeline.
- Copy the task sheet below, let AI generate an inspectable checklist or EditPlan first, and confirm before running mesh or material operations.
What is the primary role of `glTF-Transform` and `Khronos glTF Validator` in VECTOR’s delivery layer?
Explanations, cases, and exercises are authored by Reallier. Links provide further learning. The workplace activity and people are fictional.