@Mustafa Umut Sarac, @jobbie: Thank you! I'm very glad that you have found my video interesting)
"What pins were you using?"
Pins in my registration pad a ordinary household pins like this:
I cut them to about 12 mm (1/2 of inch) and hold them in a pad using epoxy glue.
"Not much when dry."
You give me an excellent idea: I will add footage that shows how relief looks on dry print (I'm already working on new edition where typos are fixed). Of course it is not very prominent, but it is clearly seen in scattered light.
"In my video I posted two years ago"
Are you talking about 4 part "UltraStable Color .m4v" videos on youtube?