I'm migrating one of our products from Google Earth to Cesium, a bit late but I was brought in on the project as a firefighter. So there I am trying to achieve parity between what Google Earth used to do and what Cesium does for our product.
So far I have been working on loading kmls and checking what output is shown. I've corrected some things in our product: for example Google Earth automatically wraps components on the relief of the terrain, which Cesium doesn't do. I managed to sidestep this issue by having post-processing steps where the terrain is sampled to let entities wrap it correctly.
However I'm still having some problems: for example it took me some time to locate and correct a style problem (described in the following issue: https://github.com/AnalyticalGraphicsInc/cesium/issues/3588). At the moment I'm despairing of managing to have a GroundOverlay show up as a GroundPrimitive in Cesium, but I'm working on it (if you have any idea on the subject, I'm willing to try it out)
Since the contributing guide mentions presenting oneself on this forum, it is done