Illumination bugs when a cylinder model is concentric to a star
These bugs are seen both in Celestia v1.4.0 final and in Celestia v1.4.1 cvs.
In both cases, the inner surface should be illuminated evenly by its local star, with additional illumination by Sol and the other nearby star.
The outer surface should be illuminated by Sol and the other star.
Neither of these effects are seen.