Thank you for the answer.

1. Yes, this picture of vader is very well known.

2. Yes, this picture was main reference for making this drawing.

3. No. It wasnt made for any competition. Just for my Facebook wallpaper. I didnt wanted to use this copyrighted picture, but i liked it so much, so i decided to draw something very similar to it by my self. Thats why i decided to use my way of pixeart drawing. If You will try to compare both works there is plenty of diferences, its my vision of this picture. Something like https://i.imgur.com/15ULoG2.gif 

Tools used: Gimp, work pixel by pixel with index palette. It wasnt made by useing some sort of algorythm. Its not a mystery, You can examine some of my work while i was working on other picture: http://pixeljoint.com/forum/forum_posts.asp?TID=26127&PID=219468#219468

And :) Im glad You also liked it. ;) 

Hello, first I must say that I find your work very classy 4/5, this Darth Vader imposes, but, yes there is a but ... please, can you indicate whether or not you used for this piece these different types of tools or processes?
-This sample image:  http://img.over-blog-kiwi.com/1/02/08/65/20150122/ob_3a1fd2_000.jpg
-delaunay triangulation algorithm kind DMesh or the same type
-effect of reflections

Thank you, see no attack please, I am not against the use of these tools.

https://cdn.mos.cms.futurecdn.net/PPBF9byTYjtRDrHN2q3JyE-480-80.jpg

http://pix.toile-libre.org/upload/original/1521380764.png

http://pix.toile-libre.org/upload/original/1521380814.png

http://pix.toile-libre.org/upload/original/1521380867.gif

http://pix.toile-libre.org/upload/original/1521380891.gif

http://pix.toile-libre.org/upload/original/1521380911.gif

http://pix.toile-libre.org/upload/original/1521380943.gif

etc...

The shoulders are legit.

Thankyou, for all nice coments! 

Excellent!

Impressive. Most impressive.

nice, maybe a bit overdone, as in the head is instantly recognizable  but not the shoulders (like darth vader has these award winning shoulders) 

Awesome work!