[x3d-public] X3D4 PBR specification review: updates and demos

[GPU Group]

Q. is there a way to see the draft? If I follow the pull 8 link I get 404.
-Doug

On Tue, Mar 3, 2020 at 11:45 AM Don Brutzman <brutzman at nps.edu> wrote:

> Attendees: Michalis Kamburelis, Dick Puk, Don Brutzman
>
> Michalis showed and described a number of updates to the Physically Based
> Rendering (PBR) capabilities for X3D4, matching glTF capabilities.
> Variations in lighting, normal mapping, textures and many other features
> look great!  Very dramatic progress.  8)
>
> [1] X3D4 draft specification, pull request 8
>      https://github.com/Web3DConsortium/X3D/pull/8
>
> [2] Test scenes
>      https://github.com/michaliskambi/x3d-tests/tree/master/pbr
>
> Now contains demo of
>    - Material with diffuseTexture combined with emissiveTexture,
> normalTexture, shininessTexture, specularTexture, ambientTexture
>    - UnlitMaterial
>    - PhysicalMaterial
> - UnlitMaterial added
> - PhysicalMaterial for punctual lights implemented
>    - with metallic/roughness tests
>
> CGE view3dscene github/snapshot version is supporting latest work.
>
> * https://castle-engine.io
>
>    with dev snapshots at
> * http://michalis.ii.uni.wroc.pl/view3dscene-snapshot
>
> TODO list of all nodes added and changed - mostly covered in draft spec,
> implementation efforts continue.
>
> Animation button has been added to current view3dscene that supports
> fine-grained animation control.  Cool and helpful!  (Screenshot attached).
>
> Possibility of automating screenshot images and videos via command line:
> this will be a good feature to start exercising as part of the examples so
> that everyone can see what expected rendering looks like.  This would put
> good reference examples.
>
> - Don is currently tuning NPS Xj3Dv2.2 for such images and will explore
> how we can do this with view3dscene for advanced rendering + X3D4 support.
>
> Long-term: keeping these examples in place is great.  Will further think
> about how to best locate Michalis' open-source reference examples in Web3D
> version control as part of overall X3D4 delivery.
>
> Looking ahead, near term:  more work continues, but it seems like time to
> share this big effort for viewing comment.  It will take time for everyone
> to absorb.
>
> Comparing with glTF is especially useful... we will convert/implement all
> of the glTF examples for direct comparison.  Some small X3D4 differences
> will be evident (for example allowing lighting-equation variability and
> differing default values for glTF lighting coefficients/fields). We also
> expect to consider gamma correction.
>
> X3D weekly teleconference discussion/demonstration planned for 13 March.
>
> - Discussion point includes whether it is OK to start a public/implementer
> comment period.
>
> - Future edits to draft spec will be in PR8, but not until
> Michalis/Dick/Don are ready.
>
> - When the working group agrees that draft X3D4 PBR PR8 is at a sufficient
> level of maturity, important topic will be when can public review begin.
> This will be important to make sure we have an excellent implementation.
> Sooner will be better than later.
>
> I must add that Web3D membership has value.  If you have not yet joined,
> please consider doing so.
>
> * Join the Web3D Consortium
>    https://www.web3d.org/join
>
> Everyone (member and public) interested should plan to attend the Friday
> March 13 meeting.
>
> Meanwhile: heavy applause for Michalis!!  Here we go...
>
> all the best, Don
> --
> Don Brutzman  Naval Postgraduate School, Code USW/Br
> brutzman at nps.edu
> Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA   +1.831.656.2149
> X3D graphics, virtual worlds, navy robotics
> http://faculty.nps.edu/brutzman
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>
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