Rendering issues with firefox

[Lectem]

I am not sure if this is an issue with magnum itself or with firefox (perhaps webgl2 only?), but the model viewer seems to have some depth issues. It does not happen with Edge on the same computer.

Here are the webgl reports:

Firefox

Webgl 1

Platform:	Win32
Browser User Agent:	Mozilla/5.0 (Windows NT 10.0; WOW64; rv:55.0) Gecko/20100101 Firefox/55.0
Context Name:	webgl
GL Version:	WebGL 1.0
Shading Language Version:	WebGL GLSL ES 1.0
Vendor:	Mozilla
Renderer:	Mozilla
Unmasked Vendor:	Google Inc.
Unmasked Renderer:	ANGLE (Intel(R) HD Graphics 4600 Direct3D11 vs_5_0 ps_5_0)
Antialiasing:	Available
ANGLE:	Yes, D3D11
Major Performance Caveat:	No

Webgl 2

Platform:	Win32
Browser User Agent:	Mozilla/5.0 (Windows NT 10.0; WOW64; rv:55.0) Gecko/20100101 Firefox/55.0
Context Name:	webgl2
GL Version:	WebGL 2.0
Shading Language Version:	WebGL GLSL ES 3.00
Vendor:	Mozilla
Renderer:	Mozilla
Unmasked Vendor:	Google Inc.
Unmasked Renderer:	ANGLE (Intel(R) HD Graphics 4600 Direct3D11 vs_5_0 ps_5_0)
Antialiasing:	Available
ANGLE:	Yes, D3D11
Major Performance Caveat:	No

Edge

Platform:	Win32
Browser User Agent:	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36 Edge/15.15063
Context Name:	experimental-webgl
GL Version:	WebGL 1.0
Shading Language Version:	WebGL GLSL ES 1.0
Vendor:	Microsoft
Renderer:	Microsoft Edge
Unmasked Vendor:	Microsoft
Unmasked Renderer:	Intel(R) HD Graphics 4600
Antialiasing:	Available
ANGLE:	No
Major Performance Caveat:	No

No webgl2 support

[Lectem]

Just saw that the depth buffer had only 16bits precisions for firefox, this could be the reason for this issue... Full report here :

Firefox

Edge

[mosra]

Fixed in f579bef, thanks for all the help on Gitter.

Just for the record: was a depth buffer issue, 16bit not being enough for the crazy depth range in the projection matrix, reducing that range made it work.