occlusionMetallicRoughness

[blitz-research]

Hi,

I see the gltf2 corset sample model has its occlusion/metallic/roughness textures packed into the one texture:

https://github.com/KhronosGroup/glTF-Sample-Models/blob/master/2.0/Corset/glTF/Corset_occlusionRoughnessMetallic.png

But which texture channels go where? Is it R=occlusion, G=metallic, B=roughness? Is this hardcoded in or docced anywhere?

And will there be a cheat sheet for gltf2?

Bye!
Mark

[donmccurdy]

Hi @blitz-research — glTF uses the same packing order as UE4:

channel	texture
red	occlusion
green	roughness
blue	metallic

This is described in the schema, but I'm not sure it's made it into the human-readable spec yet.

There is discussion in a github issue with much more detail here. Here is the relevant UE4 documentation; those are the export settings you would use in Substance Painter, for example.

[pjcozzi]

And will there be a cheat sheet for gltf2?

I hope so! @javagl is the creator of the 1.0 reference.

[javagl]

And will there be a cheat sheet for gltf2?

I hope so! @javagl is the creator of the 1.0 reference.

The PBR is a big thing. There certainly will be an update for the overview - hopefully soon, but don't hold you breath.

[blitz-research]

Thanks Don, just what I needed. All the info is indeed there somewhere, it's just a bit hard to find sometimes!

…

On Wed, May 3, 2017 at 11:47 PM, Marco Hutter ***@***.***> wrote: And will there be a cheat sheet for gltf2? I hope so! @javagl <https://github.com/javagl> is the creator of the 1.0 reference. The PBR is a big thing. There certainly will be an update for the overview - hopefully soon, but don't hold you breath. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#54 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ADU3Qp5uTiQYPApFc2d_nX0bhe9v3iQbks5r2GlCgaJpZM4NO7Ra> .

[emackey]

OK to close this?

[blitz-research]

Fine with me.

…

On Tue, Jul 11, 2017 at 8:27 AM, Ed Mackey ***@***.***> wrote: OK to close this? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#54 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ADU3QvGKA5KmDZf-KRzMPbuv-CRHPUUdks5sMokngaJpZM4NO7Ra> .