Painting tips and techniques

There are many tutorials, videos and articals about HOW TO on youtube... I am pretty sure you can find them yourself but maybe it can help to others to public some cool of them here.

I found one interesting optical illusion which explanation can help.
http://web.mit.edu/persci/people/adelso ... usion.html

Maybe you found another cool optical illusion, painting tips and techniques that can post.. Feel free (If I can say that ) to post it here.

This one is so incredible!
Can move in clock wise and anti clockwise!



And some other in this one!
http://www.ritsumei.ac.jp/~akitaoka/index-e.html

4 Artists paint 1 tree

This guy is amazing!
https://www.youtube.com/channel/UCGtGTA ... HrEKRgRUHQ

Haha, cool.
But I think videos of pudjakjuzto's creation process are almost same interesting as this;)

Oga's video is most inspiring, btw.
Both are inspiring. Thank you very much , pilou.

Loish tutorial on stylized female head
https://loish.deviantart.com/art/tutorial-drawing-a-female-face-517588691

Verving!

https://www.youtube.com/watch?v=qVnt8p6KS6c

http://www.ctrlpaint.com is very cool and interesting - especially for beginners. But there is a drawback - this guy Matt Kohr is focussed with photoshop. But there are also globally tricks (usefull for other painting apps too)

e.g. this one - its just a mental training and you can do this also in Verve - FORM NOT SHAPE: https://www.psd-tutorials.de/forum/proxy.php?link=https%3A%2F%2Fwww.ctrlpaint.com%2Fvideos%2Fform-not-shape&hash=96ae3e8173e75ba0f2cab86e3baff8d0 is one of his great tipps!

CtrlPaint site is excellent!
and a cool free prog traditionnal 2D program online is SumoPaint for apply the above!
https://www.sumopaint.com