R4 - Render and Bump mapping

I made the "arms" today but also did some rendering and tried out bump mapping...
I really like the bump mapping... it adds a lot of realism to the background and also can easily make the metal look scratched or roughed up.

I made this to add a light beat up look to the robot using bump maps. 

I actually used this one as a bump map to make the sand.

This is the sand I used in the final piece.

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