In case you're wondering, "Kugelblitz" is German for "ball lightning" (literally "spherical lightning")- probably refers to showing the "sphere" (the Earth) as fast as lightning?
Great ! I tried it on my apple M1Pro and it works fine :)
I would not put the grid at first lunching and I'd like that the earth keep spinning a bit when throwing it with the mouse !
As if Google Earth wasn’t smooth on a 2.0 GHz Pentium 4 in 2009