One Minute Tutorials - Realism Series
In this series I'll give various tips and techniques on how to add realism in Cinema 4D, GorillaCam, and C4DtoA.  Part 1 is using GorillaCam to quickly animate a realistic camera phone/iPhone.  
How to use the Utility Shader to add dust and paint specks to your materials inside of C4DtoA.  The utility shader allows you to select the upward facing geometry so that you can use it as a matte and apply dust and paint specks in realistic locations.