Hello all,

How is the default contour level in the Volume Viewer calculated when you first open up a .mrc file?  I've tried the average density, and the root-mean-square of all voxels, but both do not match Volume Viewer's default level.  I've tried looking here [http://www.cgl.ucsf.edu/chimera/docs/ContributedSoftware/volumeviewer/framevolumeviewer.html] for documentation on this, but it does not mention it.  

Thanks,