We need glTF model including lights extension

[takahirox]

Description of the problem

We have removed glTF Monster model in #18579. It was the only glTF model which has lights extension in our examples. I think we need a new model (or another existing model) which has lights extension for the test and showing we support lights extension.

Three.js version

• Dev
• r113
• ...

Browser

• All of them
• Chrome
• Firefox
• Internet Explorer

OS

• All of them
• Windows
• macOS
• Linux
• Android
• iOS

Hardware Requirements (graphics card, VR Device, ...)

[cx20]

The only glTF model that corresponds to the Lights extension I know is the following PR.
KhronosGroup/glTF-Sample-Models#210

[donmccurdy]

Yeah, the current examples available aren't really clear — you can see that there is light, but it's not obvious whether the lighting configuration is right. It would probably be best to create a new example in Blender, with clear success/failure modes like this sample: https://github.com/KhronosGroup/glTF-Sample-Models/tree/master/2.0/AlphaBlendModeTest.

[cx20]

Of course, it is desirable that there is a cool model. Unfortunately, I still don't know that.

@emackey Do you have any advice?

[emackey]

Someday I hope to find the time to make such a sample model for punctual lights. Right now I seem to have my hands full with clearcoat and other PBR Next extensions.