Hi, I'm using chimera 1.2309 version. And I found out that MD movie module in chimera doesn't display AMBER trajectory file with periodic condition correctly. I works well only with non-periodic condition trajectory file. Another visualization program, VMD, has two seperated options for AMBER trajectory file: with periodic condition and not. I prefer display style of chimera. So, I really hope to see my AMBER trajectory with Chimera. Do you have any tips for this problem? or have plan to add the format, with periodic boundary condition. :-) Thanks again for your great program and have a nice day! ============================================= Lee, juyong Ph.D student, Department of chemistry, Seoul National University, Korea. drfaust23@gmail.com