Photometric Stereo Technique for Materials - Using Shadow to capture Surface Detail

Took me a few years of research and over 6 months of the actual video content editing, but finally here it is:
A video about photometric stereo technique for materials creation.
Unfortunately its another a bit long too one, but it was the only way to keep all these basics together. Hope someone finds it useful and interesting
https://youtu.be/7YGd3bcO_Ys
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Thanks to all of you who did that already :)
Cheers!