Point clouds are not correctly rendered on mobile browsers.

[jlecoeur]

Describe the bug
3D Point clouds are not correctly rendered by the viewer on mobile browsers.
Related to #1672.

To Reproduce
Load example https://www.rerun.io/viewer?url=https%3A%2F%2Fapp.rerun.io%2Fversion%2F0.16.0%2Fexamples%2Fnuscenes_dataset.rrd on a mobile browser.

Expected behavior
Same as native viewer and desktop browser.

Screenshots

If we increase the UI point size to a very big value, the spheres do show up, but appear to be missing faces:

Desktop (please complete the following information):

• OS: Android (11)
• Browser: tested with Firefox (125.3.0) and Chrome (124.0)

Rerun version
0.16

[Wumpf]

Likely the same issue as

• M1 MacOS browser ANGLE on GL glitches depth point cloud #5227

[Wumpf]

@jlecoeur thanks for filing this and even testing it on several browsers!

do you see the same issue in this demo https://www.rerun.io/viewer?url=https%3A%2F%2Fapp.rerun.io%2Fversion%2F0.16.0%2Fexamples%2Fstructure_from_motion.rrd? I have the strong suspicion that this affects only point clouds that are generated from depth images

[jlecoeur]

Yes there is the same problem on the colmap example.

I also see the issue with a custom script that logs a series of Points3D.

[jlecoeur]

Here is more information for you, the issue does not affect all devices:

• 👎 Xiaomi Redmi note 9S, Android 11, Firefox 125.3.0
• 👎 Xiaomi 11 Lite 5G, Android 11, Chrome 125.0.6422.53
• 👎 Galaxy Tab S5e, Android 11, Firefox 121.1.0, Chrome 124.0.6367.179, Brave 1.65.132 (Chromium 124.0.6367.202)
• 🆗 Galaxy Tab A 2016, Android 8.1, Brave 1.65.132 (Chromium 124.0.6367.202)
• 🆗 Asus Zenfone 9, Android 14, Firefox 126.0, Brave 1.65.133 (Chromium 124.0.6367.208)