I have trouble in getting better quality map figuers when
using Ray. After ray, the color changes a lot and the quality
seems worse than before ray.

I am using white background. what's wrong here?

Thanks
Rongjin Guan

-- 
Rongjin Guan, Ph.D.
Center for Advanced Research in Biotechnology
9600 Gudelsky Drive
Rockville MD, 20850
Tel: 301-738-6210
Fax: 301-738-6255