I used different version with cesium
letf one is 1.11 , right one is 1.9
The following rendering:
http://xiangce.baidu.com/picture/detail/9dd0cf4b49d2e5198a4edcc6b056780581b97e1b?from=dialog.
the effect of older verison is better than newer version.
i only added property of backgroundcolor. I think this will not affect the effect.
the two version used the same code to add entity