Normal map artifacts - draco compression

Questions
,
1

I’m using gltf-pipeline v2.0.1 to compress this glTF.

Here is the compressed GLB.

As you can see, the compressed version has artifacts that the none-compressed one doesn’t.

I’m using this three-js viewer and babylonjs sandbox to check the result.

With compression:
PNG

Without compression:
PNG

There is also a warning after the compression model is loading:
warning

Maybe the draco_decoder.wasm should be updated?

On babylonjs the artifacts are less significant but still exist (you should remove the Ambient map or else the model will be entirely black)

Any suggestions?

2

It may be worth trying different compression options in glTF-Pipeline, or filing a bug there or on the Draco repository. I’m not sure what can be done after the model has been compressed with these artifacts.

1 Like
3

Thanks,

I’ve submitted an issue here.