Setup lantern demo : bulb light should be visible outside of lantern box

[arpitpolynine]

Description

I am preparing lantern in which there is bulb inside and textured glass on the lantern wall. I want to show the light coming out from the bulb. To achieve this, I tried to give emissive material and lantern wall is Blend material. The light generated by bulb using emission should coming out from lantern wall. The lantern wall should enlighten using the bulb.

Current Material
Bulb = Emissive Material
Lantern wall = Opaque material

Live Demo

https://customer.polynine.com/lamp-demo/demo.html

Version

• model-viewer: v3.4.0

Browser Affected

• Chrome, version: xx.x.xxxx.xx
• Edge
• Firefox
• IE
• Safari

OS

• [ x] Android
• [ x] iOS
• [ x] Linux
• [ x] MacOS
• [ x] Windows

[elalish]

This is getting pretty difficult for a rasterizer to handle - I don't know of any that support emissive textures illuminating other materials (a path tracer can do this, but for us, the performance just gets too bad). I'd recommend using the KHR_lights_punctual extension instead for the light bulb. See this sample model: https://github.com/KhronosGroup/glTF-Sample-Assets/tree/main/Models/LightsPunctualLamp

[arpitpolynine]

Thank you for your help.

So modelviewer doesn't support KHR_lights_punctual extension. The given reference link is not looking like as open source.

Can you help me where I can find a viewer which can support KHR_lights_punctual and I can see how the lights are looking?

Thanks again, really appreciated!

[elalish]

model-viewer does support KHR_lights_punctual. And the link I gave is open. You can download that model and put it in MV to see the light rendering properly.