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Third Party Issue
Votes
0
Found in
2019.4
2019.4.23f1
2020.3
2021.1
2021.2
Issue ID
1328677
Regression
No
[macOS] With OpenGL, properties unset when contained in same instancing buffer
Reproduction steps:
1. Open the attached user's project "1019086-Poker.zip"
2. Enter Play Mode and observe the poker chip count
3. Run a Mac build with the Graphics API value set to OpenGL Core on a Mac with an integrated graphics card.
4. Observe the poker chip count
Expected results: all poker chips show as in the Editor
Actual results: bottom layer of chips (using single buffer for both UV and alpha properties) is invisible due to Alpha remaining at the default value (see attached Results.png)
Reproduces on: 2019.4.26f1, 2020.3.9f1, 2021.1.8f1, 2021.2.0a17
Could not test on 2018.4.35f1 due to the project breaking when downgrading
Reproducible with these machines/browsers:
iMac (21.5-inch, Late 2013), OSX 10.14.6, i5-4570R @ 2.7GHz, Intel Iris Pro 1536 MB
MacBook Air (13-inch, mid 2012), OSX 10.14.6, Chrome 90.0.4430.93, Firefox 88.0
MacBook Air (13-inch, mid 2012), OSX 10.15.7, Chrome 89.0.4389.114
MacBook Pro (Retina, 13-inch, Early 2015), OSX 10.14.5, Chrome 89.0.4389.82
MacBook Air (13-inch, Early 2015), OSX 10.15.7, Chrome 87.0.4280.141
Not reproducible with these machines/browsers:
Windows 10 (Microsoft Edge, Chrome and Firefox)
MacBook Pro (Retina, 15-inch, Mid 2014), OSX 10.15.4 (Safari and Chrome)
MacBook Pro (15-inch, 2016), OSX 10.15.7 (Chrome version 90.0.4430.93, Firefox version 87.0, Safari version 14.1)
MacBook Pro (15-inch, 2019), OSX 10.14.16, Chrome 89.0.4389.114
MacBook Pro (16-inch, 2019), OSX 10.15.7, i9 2.4 GHz, Intel Graphics 630 1536 MB
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Resolution Note (2021.2.X):
The bug is specific to OpenGL (WebGL/OpenGL Core) on Intel graphics cards in 2012-2015 Macs. This is because of how arrays of structs are packed in shader uniform buffers. A workaround is to make the struct fields 16 byte aligned