m3-org/gltf-optimizer

can pull, optimize, and screenshot gltf assets automatically

Booths

Download templates: https://sketchfab.com/3d-models/remixable-booth-templates-d565cb7935744d6190b7d23b260e743b

models

1	2	3	4	5	6

templates

1	2	3

gltf-optimizer's Issues

measuring and grading asset performance

First need to measure asset performance, give a color code (red for unoptimized, green for good), in order to know how much to optimize for optimal settings

Resources

• Demo: https://www.khronos.org/gltf/gltf-asset-auditor/
• Recommended Schema: https://github.com/KhronosGroup/gltf-asset-auditor/blob/main/tests/schemas/khronos-recommended.json
• Publishing guideline summary: https://github.com/KhronosGroup/3DC-Asset-Creation/blob/main/asset-creation-guidelines/RealtimeAssetCreationGuidelines.md#publishing-targets-summary
  • More details: https://github.com/KhronosGroup/3DC-Asset-Creation/blob/main/asset-creation-guidelines/full-version/sec99_PublishingTargets/PublishingTargets.md

Most basic usage: node index.js {schema-json-filepath}.json {glb-model-filepath}.glb

optimize files using MSFT_lod

do LOD + range requests this way: https://github.com/takahirox/glTF-Transform-lod-script

first screenshot the glbs, these screenshots can potentially be used as imposters
maybe if filenames labeled based on rotation it can even be used like a sprite, or made as sprite sheet

second inspect glbs and keep log of stats, including extensions
if something fails, we can debug it later as to maybe what the cause is

Lastly, then run optimization scripts as a cronjob
verify files are working

use and document model-splitter pipeline

grab latest release from: https://github.com/playkostudios/model-splitter/releases/tag/3.3.0

this works for most use cases:

make LOD with 2 mesh:texture resolution variants (50% and 25% mesh, 25% and 12.5% textures)
the textures are fairly well optimized, jpegoptim couldn't compress anymore
model-splitter-cli-linux in.glb out --aggressive 0.5:25% 0.25:12.5% --force --embed-textures

test with buncha assets from hyperfy perhaps

optimization steps

1. resize all textures to <2k + power of two
2. ktx all textures
3. draco compress meshes
4. instance any meshes used more than a few times
5. palette atlas colored PBR meshes and merge em all together, maybe spatially grouped