* Add model vertex color support
* Fix an issue with the Tiangong model not loading properly and set a correct bounding sphere size for it
* Update caching for models
* Update previous model examples to the new format
* And add a new example to test the new vertex colors support
* Apply suggestions from code review
Co-authored-by: Alexander Bock <alexander.bock@liu.se>
* Add a model example with lighting
* Improve the basic example and add a separate example for vertex colors
* Add visual test for vertex colors (#3348)
* Update the readme file for the visual tests
* Add asset instruction to the visual testing readme
* Add visual test for RenderableModel with vertex colors
* Apply suggestions from code review
Co-authored-by: Alexander Bock <alexander.bock@liu.se>
* Update test when asset changed name
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Co-authored-by: Alexander Bock <alexander.bock@liu.se>
* Update Ghoul
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Co-authored-by: Alexander Bock <alexander.bock@liu.se>
