TextureEncoding inconsistency

[mvaligursky]

Upstream thread: KhronosGroup/glTF-Sample-Models#296

easiest repro for me is to load this, while debug console is opened:
https://cx20.github.io/gltf-test/examples/playcanvas/index.html?category=tutorialModels&model=TextureEncodingTest&scale=0.2&type=glTF-Binary

The spheres in left column are brighter than in the other columns, while they should be the same.
It does not happen each time this is reloaded.

[slimbuck]

managed to reproduce in the viewer too:

https://playcanvas.com/viewer?load=https://cx20.github.io/gltf-test/tutorialModels/TextureEncodingTest/glTF-Binary/TextureEncodingTest.glb

(Reload tab with browser cache disabled)

[willeastcott]

@cx20 We don't seem to be able to repro this any more. I suspect it has been fixed. Can you confirm with the gltf-test texture encoding test?

[cx20]

I tested it again with PlayCanvas v1.55.0.
This problem is no longer reproducible, so I think it's probably fixed.

[mvaligursky]

Closing this as fixed.