[x3d-public] UnlitMaterial

[Holger Seelig]

There seems to be lot of differences across browsers:

X_ITE
https://create3000.github.io/x_ite/playground/?url=https://create3000.github.io/Library/Tests/Components/Shape/CompareEmissive.x3d

X3DOM
https://andreasplesch.github.io/Library/Viewer/index.html?url=https://create3000.github.io/Library/Tests/Components/Shape/CompareEmissive.x3d

Download URL for Castle and FreeWrl:
https://create3000.github.io/Library/Tests/Components/Shape/CompareEmissive.x3d

Best regards,
Holger

--
Holger Seelig
Leipzig, Germany

holger.seelig at yahoo.de
https://create3000.github.io/x_ite/

> Am 20.02.2025 um 23:21 schrieb Andreas Plesch via x3d-public <x3d-public at web3d.org>:
> 
> Looking at UnlitMaterial:
> 
> https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Part01/components/lighting.html#LightingUnlit
> 
> Can UnlitMaterial be thought of as Material without light contributions ? Eg. on_i for all lights is 0 ?
> 
> It looks equivalent but perhaps there is a subtle difference. Yeah, one subtle difference appears to be that the transparency field is applied to diffuse.a rather than emissive.a .
> 
> Related, the Phong lighting in the case of on_i all zero, does not seem to have a way to specify an alpha for emissive ? Not sure how much use emissive alpha has but UnlitMaterial has it.
> 
> Thanks for any input, -Andreas
> 
> --
> Andreas Plesch
> Waltham, MA 02453
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