Hi Thomas, Sorry no, there is no option to use electron scattering factors. The molmap command does treat different elements differently, however: Each atom is described as a 3D Gaussian distribution of width proportional to the resolution and amplitude proportional to the atomic number. <http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/molmap.html> There is a also a molmap command in ChimeraX, and it works the same way as in Chimera. Best, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco

On Oct 29, 2019, at 3:27 AM, Thomas Bick <tbick@uni-potsdam.de> wrote:

Is it possible to create a density map based on a pdb using electron scattering factors rather then a sole gaussian distribution? The molmap command apparently doesn`t have a argument to include scattering factors? Are there maybe different possibilities do that in Chimera? Thanks for the help in advance! Best Thomas Bick