Celestia v1.2.5pre6: comet tails not blocked by other obj

[selden]

While comparing the CfA and Horizons positions of Hale-Bopp, I discovered that the cometary tail of one of them was visible through the "asteroid" body of the other.



The asteroid body of the background comet is obstructed when it goes behind the foreground asteroid. It'd be nice if cometary halos were obstructed, too.

System description: 256MB, 500MHz p3, WinXP sp1; 128MB Nvidia GF4 Ti4200, Detonator 40.72; Celestia v1.2.5pre6

[Rassilon]

This happens also when using a model for a nebula. The nebula will appear in front of all objects within its radius.