Hi Ian, Check out "Surface Capping" (under Tools... Depiction). When you turn on "cap surfaces" it hides the inside of the clipped surface with a solid plane so it looks like you are slicing a block of marble or cheese rather than a thin shell. There are various options for the display and color of the "cap." http://www.cgl.ucsf.edu/chimera/docs/ContributedSoftware/surfcapper/ surfcapper.html There is no way to make the inside of a surface a different color than the outside, but I am hoping this capping option will meet your needs. If you are working with contour surfaces from Multiscale Models or Volume Viewer, there are some lighting options that affect the inside/outside appearance (if so, and you would like more details on that, let me know), but usually capping is the way to go. Best, 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 Feb 4, 2008, at 3:47 PM, Ian Yarbrough wrote:

Hello,

Is there any way to color the interior face of a surface (when exposed by clipping) a different color or shade than the outside surface? Or a way to show the interior as a volume instead of a cavity?

Essentially I'm looking for the same thing as this fellow describes in his post on the following date:

Andrew Jewett aij at physics.ucsb.edu Mon Feb 28 16:56:34 PST 2005 http://www.cgl.ucsf.edu/pipermail/chimera-users/2005-February/ 000287.html

He describes it much more elegantly than I can. Was this feature was ever implemented?

Thanks and cheers,

Ian Yarbrough Texas A&M University Biochem/Biophysics Dept 832-858-9278