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Want to try and see if the technique would work on coins
But can't seem to find the setup up that was used.
Once into the field of stereoscopes etc. then it is ££££ ... I think fluorescent lighting is used sometimes.
I also read that archaeologists have photographic methods for detail, not sure which.
An alternative I might try is macro 3D modelling, there it is possible to raise and lower the plane, and sure to be a programme somewhere to add a colour gradient, would like to try 3D using a usb microscope at some point also.
https://dinosaurpalaeo.wordpress.com/20 ... acro-lens/
has some 2D images of a 3D result , could not find any really detailed ones ( as in the hundreds of mm needed for some coins maybe) on sketchfab though.
Also an easy way to look through the patina would be good .