rawwerks/vibecad/gltf-transform

Name: gltf-transform
Author: rawwerks

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By rawwerks
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rawwerks/vibecad
Plugin gltf-transform
plugins/gltf-transform/skills/gltf-transform/SKILL.md
Updated 23 Oct 2026
Version 1.0.01 version recorded

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Optimize and post-process GLB/glTF 3D models. Use when compressing models for web delivery, reducing file size, simplifying geometry, inspecting model stats, merging models, or converting textures. Triggers on: optimize GLB, compress model, reduce file size, simplify mesh, draco compression, meshopt, webp textures, inspect model, merge GLB, model optimization.

Install

npx vskill@latest install rawwerks/vibecad/gltf-transform

SKILL.md

glTF Transform

Post-process GLB/glTF files: optimize, compress, inspect, and transform 3D models.

CLI docs: https://gltf-transform.dev/cli
GitHub: https://github.com/donmccurdy/glTF-Transform
npm: @gltf-transform/cli

Zero-Setup with bunx

No installation required. Run any command with:

bash

bunx @gltf-transform/cli <command> [args]

First run downloads the tool, subsequent runs are instant.

Quick Start

bash

# Inspect model stats first
bunx @gltf-transform/cli inspect model.glb
 
# One-command optimization (good defaults)
bunx @gltf-transform/cli optimize input.glb output.glb --compress draco --texture-compress webp

CAD Workflow Integration

Typical pipeline after generating models with build123d:

create geometry → export GLB → optimize → verify visually

build123d exports high-quality CAD geometry
gltf-transform compresses for web delivery
render-glb verifies the result

Compression Methods

Method	Best For	Trade-offs
Draco	Web delivery, Three.js	Smallest geometry, requires decoder
Meshopt	Universal, animations	Good compression + animation support
Quantize	Compatibility	No decoder needed, moderate compression

bash

# Draco - best geometry compression
bunx @gltf-transform/cli draco input.glb output.glb
 
# Meshopt - geometry + animation compression
bunx @gltf-transform/cli meshopt input.glb output.glb
 
# Quantize only - no external decoder needed
bunx @gltf-transform/cli quantize input.glb output.glb

Texture Compression

bash

# WebP - good compression, wide browser support
bunx @gltf-transform/cli webp input.glb output.glb
 
# Resize large textures
bunx @gltf-transform/cli resize input.glb output.glb --width 1024 --height 1024

Common Operations

Inspect Model Stats

bash

bunx @gltf-transform/cli inspect model.glb

Shows vertex count, file size breakdown, texture sizes - helps decide what to optimize.

Simplify Geometry

bash

# Weld duplicate vertices first
bunx @gltf-transform/cli weld input.glb temp.glb
 
# Then simplify
bunx @gltf-transform/cli simplify temp.glb output.glb --ratio 0.5

Useful for CAD models which often have more detail than needed for web viewing.

Merge Multiple Models

bash

bunx @gltf-transform/cli merge part1.glb part2.glb assembly.glb

Aggressive Optimization

bash

bunx @gltf-transform/cli optimize input.glb output.glb \
  --compress draco \
  --texture-compress webp \
  --simplify true \
  --simplify-ratio 0.5

When to Use

Scenario	Commands
Web delivery	`optimize --compress draco --texture-compress webp`
Check model stats	`inspect`
High-poly CAD model	`weld` then `simplify --ratio 0.5`
Combine parts	`merge`
Debug issues	`inspect` then targeted fixes

Security

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Source

SKILL.md in the repositoryCheckingplugins/gltf-transform/skills/gltf-transform/SKILL.md

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