Dear Chris, 
Thank you very much for creating MRIcroGL resource for visualization. I've created a spinning skull thickness image. 
https://photos.app.goo.gl/PU4K2xws3aE9n1...

The script goes as follows:
import gl
gl.resetdefaults()
ktime= 40
ksteps= 180
gl.resetdefaults()
gl.loadimage('/Users/user/path/CT_Philips_thr300_bin_char_LocThk.img')
#adjust contrast to show thickness
gl.minmax(0, 0, 10)
gl.colorname(0,'blue2red')
for x in range(1, ksteps):
gl.azimuthelevation(0+(x*2),10)
gl.wait(ktime)

Q1: How do I capture a screenshot of every point in the loop using filename_number.extension?
Q2: How do you feel about having a gallery of the visualizations scripts? (Would be so much easier if people share their results)

thanks, 
Mikolaj