GLB PBR Runtime Export

[EricBeetsOfficial-Opuscope]

Hi Andreas,

I read the runtime export is still experimental (only albedo and occlusion textures seem to be supported).
Is there a plan to support the fully PBR material for a runtime export (bump seems to be easy to add, but metallic-roughness seems harder ..) ?
Do you have special instructions to try working on a PR for it ?

Thanks in advance,
Regards,
Eric

[atteneder]

Hi @EricBeetsOfficial-Opuscope ,

The state of export (what is supported and what not) can be found in the documentation->features->Material Export and currently in some more detail in #260 .

Support for more PBR features, including occlusion-roughness-metallness, was added with 4.6.0.

I still consider export experimental, as it was only tested with the most important shaders of URP/HDRP (Lit mainly).

hth

[EricBeetsOfficial-Opuscope]

Oh .. I probably didn't understand the runtime export.
It supports the Unity Built-in Universal Render Pipeline/Lit shader, but not the glTFast Shader Graphs/glTF-pbrMetallicRoughness ?

I can reproduce the behaviour:

• Import the DamagedHelmet (GLTF format) in Editor (from https://github.com/KhronosGroup/glTF-Sample-Models/tree/master/2.0/DamagedHelmet/glTF)
• Drag and drop into my scene (with the correct shader Shader Graphs/glTF-pbrMetallicRoughness-Opaque)
• Export this model (right click, in the hierarchy Export GLTF-> glTF (.gltf)).
• In the finder I only see the albedo texture (there is the same behaviour in runtime).

Indeed, if I switch to the built-in PBR and re-switch to the glTFast PBR, the exporter save the albedo/occlusion/emissive/normal texture.. is that a bug ? Or I maybe do something wrong ?

[EricBeetsOfficial-Opuscope]

oh ok .. we actually wanted to be able to export a glb from an imported gltf (using glTFast as a runtime converter)

[atteneder]

@EricBeetsOfficial-Opuscope I see. Out of curiosity, what is your use-case? I guess you/the user edits the scene in some way, right?

[EricBeetsOfficial-Opuscope]

Actually, users can import models (from an url, it could be glb or gltf files). Then, we store the scene on our servers (to be able to re-open the composed scene later). It would easier for us to store a unique glb file by model (instead of a .zip or a gltf with resources files). That's why we would need a runtime converter from gltf to glb 😉

[atteneder]

fyI: Opened #351

[EricBeetsOfficial-Opuscope]

oh great ! thank you !!