model textures are corrupted, webgl bug?




9 months ago
8 months ago


(Reporter: w0wkin, Unassigned)


62 Branch

Firefox Tracking Flags

(Not tracked)



(1 attachment)



9 months ago
Posted image FF_broken.png
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:62.0) Gecko/20100101 Firefox/62.0
Build ID: 20180830143136

Steps to reproduce:

Download and install 62 version of firefox 64-bit

Actual results:

 Preview is OK, but when you open model, textures are messed and broken. 

Expected results:

Expected to work as intended (like other browsers do, 61.0.2 is OK also)

Comment 1

9 months ago
Hi, I managed to reproduce this issue in Firefox Beta ID 20180830143136 but I can no longer reproduce this issue in Firefox Nightly 64.0a1 (2018-09-04).

Can you please try to reproduce this issue using the latest version of Firefox Nightly you can find it here:
Flags: needinfo?(w0wkin)

Comment 2

9 months ago
I can not reproduce this issue in Firefox Nightly 64.0a1 (2018-09-04), it looks absolutely OK.
Flags: needinfo?(w0wkin)

Comment 3

9 months ago
Here, I only managed to reproduce on on firefox stable ()
Nightly (64.0a1) doesn't have the bug.

tested on win10, on a nvidia gpu, and on a intel gpu)

Telated thread on sketchfab forum
(User having an AMD radeon GPU has the bug on all models it seems, much more than nvidia/intel GPU)

FYI just an indication looks like a bug Angle based webgl browsers had a long time ago related to the "restart" in triangle strip primitives

Comment 4

9 months ago
We are having similar issues with WebGL based games on FF 62: WebGL rendering is messed up just like on the sketchfab screenshot above.
The issue is gone on 63.0b4 (64-bit)
Can you please release a patch to the stable version, users are not happy.

Comment 5

9 months ago
63.0b4 is OK for me also.

Comment 6

9 months ago
I confirm the bug on my browser. Actually came here to report it myself and found this.

Model (not just this but all models on sketchfab):

On firefox:

On Egde:

I think it could be an issue with Firefox's WebGL plugin? I'm not sure.

Comment 7

8 months ago
We fixed it on sketchfab, we confirm it's related to triangle strip, directx and the primitive restart

To repro the bug on sketchfab you need to add ?force_triangles=false to any sketchfab url model

Comment 8

8 months ago
(sketchfab dev)

The flag should be ?force_triangles=0, however I went too fast and the flag isn't respected at the moment. (see

Comment 9

8 months ago
Duplicate of
( better follow the other one )

Comment 10

8 months ago
Hi, Since this issue cannot be reproduced anymore and there is already a different defect logged for the second issue, I will mark this as Resolved - WorksForMe
Last Resolved: 8 months ago
Resolution: --- → WORKSFORME
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