Crazy 3D drawing of glass ball

How to draw a 3D marble ball with mixed media on gray paper. 3D illustration by Marcello Barenghi http://www.marcellobarenghi.com

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FINAL PICTURE:
http://www.marcellobarenghi.com/2013/06/drawing-marble-ball.html
Materials used: http://www.marcellobarenghi.com/p/materials-used-for-my-drawing-video-on.html

IT TOOK ME:
2 hours and 55 minutes

MUSIC: "Cellular Faith" by Dan-O at http://danosongs.com ("Package" Licence)
http://www.danosongs.com/music..../danosongs.com-cellu

How to draw a marble ball, mixed media on gray paper by Marcello Barenghi - Italian Art.

Reviews:

（组图）意大利艺术家Marcello Barenghi的彩铅作品
　一组来自意大利艺术家Marcello Barenghi的彩铅作品。初看作品让我们很难想象这是彩铅画出来的，作品在写实的基础上，透着一种通透的灵气。大家一起欣赏吧！
http://www.peopleart.tv/picture/10517.shtml