Hi Ahmad, As far as I know, "mrcs" is not one of the formats Chimera reads. Chimera input formats are listed here: <http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/filetypes.html> <http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/filetypes.html#volume> I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco

On Sep 24, 2020, at 7:39 AM, Ahmad Khalifa <underoath006@gmail.com> wrote:

Can I open a .mrcs stack in chimera? What file type should I pass to Chimera in order to do that?