[Сергей Дородный]

Hello , Pablo!
Thank you for your support of the topic .
As to the question ( 3d ) - then there 's a sad story -

art on view seems very simple thing - the paint is on the canvas - is painting.
And this point of view, it shared the beginners, so want to quickly be " real artist ." And it's good, it means they have a rush.
But you must understand that a little wind , it is necessary to master .
That's probably impossible to be a mathematician , if you can not like " open" or to find the determinant of the integral over a closed circuit.
A painter can be , without knowing anything ? Still no one understands you?