glTF-Sample-Models VS glTF

Link to the model: https://github.com/KhronosGroup/glTF-Sample-Models/tree/master/2.0/Sponza

This function is the hot-path - at least with the RecursiveSkeletons sample. Anytime the program queries the transform matrix of a particular node, it reconstructs the entire transform chain of that node all the way to the root from the individual TRS representations.

First model: Intel Sponza 2022 which can be found here - https://sketchfab.com/3d-models/sponza-0cbee5e07f3a4fae95be8b3a036abc91 Second model: “Interrogation Room” which can be found here - https://sketchfab.com/3d-models/interogation-room-6e9151ec29494469a74081ddc054d569 Third model: Original Crytek Sponza which can be found here (along with other models) - https://github.com/KhronosGroup/glTF-Sample-Models/tree/master/2.0/Sponza

I'd recommend changing your 2D grid of objects so that your axis is Roughness along one side and Metal along the other. i.e. glTF Meta-Rough Sphere

Hi, I am currently trying to load the [Sponza model](https://github.com/KhronosGroup/glTF-Sample-Models/tree/master/2.0/Sponza) for my PBR Renderer. It is in the GLTF format. I have been able to load smaller models quite successfully, but when I try to load the Sponza scene, some meshes aren't properly scaled. [This image](https://imgur.com/jfApgQO) demonstrates my issue (I am not actually doing the PBR calculations here, that's just the albedo of the model). The wall is there, but it's only a 1x1 quad with the wall texture, even though it's supposed to be a lot bigger ans stretch across the entire model. Same goes for every wall and every floor in the model. The model is not broken as Blender and that default windows model viewer can load it correctly. I am even applying the mNode->mTransformation, but it still doesn't work. My model loading code looks kind of like this:

It's a model from the official glTF samples model repo at https://github.com/KhronosGroup/glTF-Sample-Models. I found it to be the perfect match for such a sample ;)

I'm a fan of the GLTF sample models.

The Khronos group is responsible for the glTF spec. They also have an examples directory

My understanding is that this is an evolution of the Autodeks Standard Surface (https://autodesk.github.io/standard-surface/), which itself is a subset set of the glTF 2.0 material with its PBR extensions (https://github.com/KhronosGroup/glTF/blob/main/extensions/RE... )

Together this means there is a lot of alignment between these models. I wouldn't be surprised to see a glTF 3.0 that adopts the OpenPBR as its main material definition, skipping the current extension complexity.

OpenPBR for material exchange combined with MaterialX for shader graph exchange combined (https://materialx.org) with OpenUSD for geometry and scene graph exchange, means together we are headed into a world where high quality 3D assets are exchangeable between content creation tools.

Search animation related topics, like skinning and weights. This is constantly debated. As for the compression it is just standard with the format, there are some old topics on it.

An open standard that is very capable (but cannot find if it can do streaming) is https://github.com/KhronosGroup/glTF

It still misses some important things in the area of shading and animation for full transfer of all qualities you find in a modern 3d creation app like Blender.

I wondered this in the past as well and I found this issue, which has a lot of discussion on it and includes some plausible possible reasons, though it seems it's not entirely clear anymore why it is like it is: https://github.com/KhronosGroup/glTF/issues/821

So the special thing about this is we didn't touch any of the PBR maps on it. At all. That was all automatic, I wrote a solving program. What I will reveal about that is the gltf spec I solved against is over here: https://github.com/KhronosGroup/glTF . We're looking at using this with some 3D scanning businesses in NYC at the moment.

https://github.com/KhronosGroup/glTF/blob/main/specification...

In the future, this can be properly done with the KHR_animation_pointer extension: https://github.com/KhronosGroup/glTF/pull/2147

I think ideally you would extend the gltf material to add control over e.g. renderOrder, colorWrite, depthWrite, then implement the extension in your gltf loader

Probably not directly, but I'd look for frameworks that work with GLTF to have proper scene and asset management.

Probably it’s some kind of Sheen. This effect gives the material a velvety fabric / fur impression, which would work well with the Tom Nook character.