thank you Jeff. Months ago I have seen on TV a program illustrating
some people working on the Leonardo's painting the way you talk here!

Actually my snipping out  seems to be some pieces from the original,
yes you are right. Some filter from digital workflow was however added
to change texture which in macro has an horrible appearance (from
paper of the book page); by applying this workflow I changed a lot
colour (and texture itself) according to my taste.
However as one can say "nothing is new under the sun"...
Actually my idea is that most of all the snips are _photographic_
(speaking about composition) snips; and in that way I excercise myself
in doing photography.

thanks again for your attention