Hello. I appreciate your help immensely. You are right that the skin surface model + cut planes produces the image I reference. That’s a great tip. I may end up going in that direction.
I originally thought it would be do-able with volume rendering. Indeed, after your response, I went back and tried some more. I just noticed the Volume Clip module doc has a picture using ROI Box – Documentation/Nightly/Extensions/VolumeClip - Slicer Wiki That picture gave me the clue what I was doing wrong!
In the module, I had selected “Create New ROI” which then changed to “MarkupsROI”. I made a box but nothing would happen when I clicked Apply. It turns out that when I created the ROI it was named “R” and things started working once I went back to the clip module and changed “Clipping ROI” to “R”.