Normal map exists but reliefs are missing

[SamuelTallet]

Hello,

First thing, thanks for your awesome work!
I have an issue with this glTF model. According to glTF Report app the model is valid:

Its reliefs appear:

But Kajiya seems to ignore its normal map:

Technical details:

• Kajiya (latest)
• Windows 10
• GTX 1060 6GB

[h3r2tic]

Hey! Looks like the asset is missing vertex tangents, which are needed for normal mapping, and which kajiya does not auto-generate right now.

[SamuelTallet]

I don't know if it can help... A Rust implementation of Mikkelsen Tangent Space Algorithm exists.

[h3r2tic]

Yup, that was very easy to plug in, thanks 😀

Still lacks feathers, but I guess we can tackle biological accuracy in another issue 😜

[SamuelTallet]

Great! Thanks.