This technique of laying over double transparencies was introduced to me by a friend he mentioned Maurice Cotterell, note the name Maurice..May your eyes see.
Maurice Cotterell deciphered The Lost Tomb of Viracocha and wrote some excellent books about his discoveries, which were recommended..
I already had one transparency of The Joseph of Arimathea stained glass window from St John the Baptist Church in Glastonbury, after my Mama passed I inherited hers, we had bought them together on a trip to Glastonbury Abbey together.
Different angles of rotation produced thousands of images, here are a few
Joseph’s Staff transforms into a Golden Lance
His Feet transform into Copper Scrolls
Guardians transform and appear
Scrolls with Pine Cone
A Lion Face