Hi Dmitriy, For images directly from Chimera, it depends on your computer. The setting is in the Effects tool (Tools... Viewing Controls... Effects). If not possible on your computer, I think there will be a message that says so when you try to turn the option on. http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/sideview.html#effects For images raytraced with POV-Ray from Chimera, there is a separate setting in the "POV-Ray Options" section of the Chimera Preferences. One way to show these options are by choosing File.. Save Image, setting the raytrace option to "true" and then clicking the "POV-Ray Options" button. Depending on your version of Chimera, it is described as an alpha channel or transparent background setting. http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/preferences.html#POV- Ray%20Options As noted in that manual page, you also need to turn off depth-cueing in Chimera (in the Effects tool mentioned above) to get a transparent background in the raytraced result. I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. meng@cgl.ucsf.edu UCSF Computer Graphics Lab and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco http://www.cgl.ucsf.edu/home/meng/index.html On Jan 11, 2008, at 2:15 PM, Krepkiy, Dmitriy (NIH/NINDS) [F] wrote:

Hi,

Is it possible to make background transparent?

Thanks,

Dmitriy