3d models turn gray

[denisTrubicin93]

Description

good afternoon
On the Xiaomi Note 9 Pro device, some 3D models lose colors (become more gray). What could it be? thanks

Version

• model-viewer: v1.2.1

Browser Affected

• Chrome

OS

Normal view on windows

Error on android

• Android

[elalish]

Interesting. You compare windows to Android AR; what about Android 3D? Also, are you using webxr or scene-viewer for AR? You can choose just one using the ar-modes attribute. Generally webxr will give more consistent results. You might try changing the exposure attribute to a value larger than 1.

[denisTrubicin93]

Thanks for the answer.
I am using webxr. This error only on Xiaomi devices. On Samsung everything is displayed correctly.
View Android 3d

[elalish]

Thanks for the additional detail! I would guess this is a GPU driver bug relating to the lighting. I'll need to get my hands on a device I can repro with to have any chance of fixing it. Can you give me a specific phone model that repros this? Preferably one new enough that I can buy it.

[denisTrubicin93]

Xiaomi Note 9 Pro 128/6
Also I tried on Browserstack, all devices except Samsung give the same error.
Maybe a bug in the 3d model? I have 5 3d models and 3 are displayed correctly

[elalish]

Thanks, that's quite interesting. If you can narrow down what about the glTF is making this happen, I'd love to know. I have a Pixel 3 I can test on if you can post a link with these different models.

[denisTrubicin93]

https://coloring3d.aestar.com.ua/food/ham/
https://coloring3d.aestar.com.ua/food/pizza/ <--here bug-->
https://coloring3d.aestar.com.ua/food/cheesecake/
https://coloring3d.aestar.com.ua/food/steak/
https://coloring3d.aestar.com.ua/food/sushi/ <--here bug-->

[elalish]

I believe this is fixed by #1657. You can test on https://modelviewer.dev/editor/ until the next release goes out.