Crazy realistic DRAWING: a MARBLE or glass BALL

How to draw 3D glass and transparent things using mixed media on gray paper. Crazy 3D drawing of a marble ball by Marcello Barenghi - Italian Art. http://www.marcellobarenghi.com
➜ MUSIC: Kirill Khursey please feel free to visit http://www.khursey.com
➜ SUBSCRIBE YOUTUBE: http://www.youtube.com/user/ma....rcellobarenghi?sub_c
➜ PLEASE TURN ON NOTIFICATIONS so you never miss a drawing :) info: https://support.google.com/you....tube/answer/3382248?
➜ FACEBOOK https://www.facebook.com/MarcelloBarenghi
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➜ GOOGLE+ https://plus.google.com/+marcellobarenghiartist
➜ TWITTER https://twitter.com/BarenghiM
➜ MY DRAWING TOOLS:
mixed media on grey paper, colored pencils, markers, watercolors, acrylic and airbrush http://www.marcellobarenghi.com/p/materials-used-for-my-drawing-video-on.html
➜ FINAL DRAWING: http://www.marcellobarenghi.com/2013/07/marble-or-glass-ball-drawing.html
➜ THIS DRAWING TOOK ME: 2 hour and 30 minutes

Incredibile disegno realistico una mitica biglia :)