For the lighting, I use SK Part Strobe Light on an iPad 1, and choose a slow fade between two colors that I like. Then I put a piece of construction paper over the screen, with a small hole in the center to let the light through.
Then, I take the photo in the dark, with a 10-30" shutter time.
here’s my first Halloween print - I “remixed” Matthew Gorton’s (Printed_Solid) Grumpy Pumpkin from Thingyverse (itself a mod of Steve Cambells grumpkin also on Thingyverse.
I hollowed it out and added custom internal supports for the face so it could be printed without external supports. Unfortunately I’m not quite the Solidworks guru I want to be yet and I couldn’t get Solidworks to merge the internal supports properly - so the final STL is a bit munted - but PreForm was able to make it printable. You can download the Solidworks part and STL here http://www.thingiverse.com/thing:174745