[x3d-public] X3D Open Meeting on Physically Based Rendering (PBR) and glTF support

Fri Mar 13 14:20:31 PDT 2020

Small notes:

1. The most important link, which is basically a summary of what I
talked about, is the
https://github.com/michaliskambi/x3d-tests/wiki/X3D-version-4:-New-features-of-materials,-lights-and-textures
(2nd point of Anita's mail).

    There are many more links from
https://github.com/michaliskambi/x3d-tests/wiki/What-is-PBR-and-why-do-we-want-it-in-X3D%3F
that describe PBR in much more depth than I did. You will find there
discussions why exactly it is more physically correct, how the artists
should perceive the new parameters (metallic, roughness) etc.

2. The demos of new material features in X3Dv4 are in
https://github.com/michaliskambi/x3d-tests/ (in the pbr/
subdirectory).

    Demo models on https://github.com/castle-engine/demo-models
showcase various CGE features, but they are not focused on X3Dv4
improvements.

    Pull requests to all repositories are most welcome :)

3. The bug about ignored diffuseTextureChannel value, that occurred
during the presentation, is fixed now :) It was specific to the
diffuse parameter. (e.g. emissiveTextureChannel worked OK already, but
I confused myself when trying to test it).

So now e.g. this works as expected:

```
material Material {
  diffuseTexture ImageTexture { url "test_texture.png" }
  diffuseTextureChannel 1
}
```

The fix will be available in ~15 minutes in view3dscene from
snapshots, http://michalis.ii.uni.wroc.pl/view3dscene-snapshots/ .

Best regards,
Michalis

pt., 13 mar 2020 o 20:00 Anita Havele <anita.havele at web3d.org> napisał(a):
>
>
> Thank you for attending our open X3D WG meeting today! As we continue working on X3D4 specification, major pieces of work in progress are now mature and ready to be included in the spec. This open meeting was specifically for: glTF lighting and physically based rendering (PBR) work. Feedback and reactions are always welcome.
>
>  Michalis Kamburelis, author of Castle Game Engine (CGE) described and demonstrated proposed X3D4 changes for PBR and glTF support.  Several models demonstrating these capabilities were discussed along with comparative implementation in other X3D4 players. Thank you, Michalis for this excellent work!
>
> Here are some links to the discussions and demos from today’s meeting.
>
>
>
> 1.      PBR why do we need it in X3D:
>
> https://github.com/michaliskambi/x3d-tests/wiki/What-is-PBR-and-why-do-we-want-it-in-X3D%3F
>
>
>
> 2.      X3D4 PhysicalMaterial node. Consistent with glTF to facilitate X3D and X3D browsers to support glTF.  It’s easy to handle glTF by converting to X3D nodes "under the hood".
>
> https://github.com/michaliskambi/x3d-tests/wiki/X3D-version-4:-New-features-of-materials,-lights-and-textures
>
> https://github.com/michaliskambi/x3d-tests/wiki/Gamma-correction-in-X3D-and-glTF
>
>
>
> 3.      Castle Animation: A series of static 3D frames in-lined in a large XML file, or external files. Animation shows transition from the first frame to the last. Where models are structurally equal, intermediate frames are created by a linear interpolation to show smooth changes.
>
> https://castle-engine.io/castle_animation_frames.php
>
>
>
> 4.      Bump mapping for cloth
>
> https://github.com/castle-engine/demo-models/tree/master/bump_mapping/cloth
>
>
>
> 5.      Bump  mapping Lizardman
> https://github.com/castle-engine/demo-models/tree/master/bump_mapping/lizardman
>
>
>
> 6.      Demo Models (Share your relevant use case models to add to this repository)
>
> https://github.com/castle-engine/demo-models
>
> 7.      View3dscence Browser:
>
> https://michalis.ii.uni.wroc.pl/view3dscene-snapshots/
>
>
>
> 8.      Import Export support
>
> https://castle-engine.io/creating_data_blender.php
>
>
>
> 9.      Castle Engine:
>
> https://castle-engine.io/
>
>
> Again, thank you for your participation today. Feedback and reactions are always welcome. A draft schedule for X3D4 is ready, based on member discussions, but we are still watching world events and conference delays/cancellations closely.  Meanwhile subscribe to x3d-public at web3d.org and watch this space.
>
>  michalis.kambi at gmail.com
>
> x3d-public at web3d.org
>
> x3d at web3d.org
>
>
> More Information about Web3D Consortium and Membership
>
>
> Best regards,
> Anita-Havele
> ____________________________
> Executive Director, Web3D Consortium www.web3d.org
> Email: anita.havele at web3d.org - Phone: +1 248 342 7662
> 650 Castro Street, Suite #120-490, Mountain View, California 94041 USA
> http://www.web3d.org/havele
> On 3/12/2020 11:26 AM, Anita Havele wrote:
>
> Our upcoming X3D WG meeting on Friday 13th March at 8:00 AM Pacific 15:00 UTC will be a fully open meeting with everyone welcome to attend.
>
> Meeting Link:   https://zoom.us/j/432546382
>
> X3D Physically Based Rendering (PBR) presentation:
>
> Michalis Kamburelis will describe proposed X3D4 changes for Physically Based Rendering (PBR) and glTF support.  He has a large number of excellent models demonstrating these capabilities, and they feel ready for comparative implementation in other X3D4 players.  https://github.com/michaliskambi/x3d-tests/tree/master/pbr
>
> All reactions and feedback welcome.
>
> --
> Best regards,
> Anita-Havele
> ____________________________
> Executive Director, Web3D Consortium www.web3d.org
> Email: anita.havele at web3d.org - Phone: +1 248 342 7662
> 650 Castro Street, Suite #120-490, Mountain View, California 94041 USA
> http://www.web3d.org/havele
>
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