Merge 3 -> 4

[iche033]

➡️ Forward port

Port ign-rendering3 to ign-rendering4

Branch comparison: ign-rendering4...ign-rendering3

Note to maintainers: Remember to Merge with commit (not squash-merge or rebase)

[codecov]

Codecov Report

Merging #423 (85f4b58) into ign-rendering4 (29876ec) will decrease coverage by 2.33%.
The diff coverage is n/a.

@@                Coverage Diff                 @@
##           ign-rendering4     #423      +/-   ##
==================================================
- Coverage           56.32%   53.99%   -2.34%     
==================================================
  Files                 147      147              
  Lines               14119    14119              
==================================================
- Hits                 7952     7623     -329     
- Misses               6167     6496     +329     

Impacted Files	Coverage Δ
ogre2/src/Ogre2MaterialSwitcher.cc	0.00% <0.00%> (-90.00%)	⬇️
ogre2/src/Ogre2SelectionBuffer.cc	0.00% <0.00%> (-87.40%)	⬇️
ogre2/src/Ogre2RayQuery.cc	73.46% <0.00%> (-20.41%)	⬇️
ogre2/src/Ogre2Camera.cc	71.20% <0.00%> (-16.80%)	⬇️
src/Utils.cc	74.73% <0.00%> (-10.53%)	⬇️
...e/ignition/rendering/base/BaseGaussianNoisePass.hh	96.66% <0.00%> (-3.34%)	⬇️
src/base/BaseScene.cc	72.96% <0.00%> (-2.30%)	⬇️

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[iche033]

disabled VisualAt test that's consistently failing, and added comment referencing #170. 85f4b58