hi, I'm currently busy designing a logo for a coffee company. But I'm stuck with the coffee bean... I drew a simple coffee bean in illustrator (two half's puzzled). The coffee bean is white on a brownish color background. I would like to make the coffee bean look a bit roasted and not so static (without adding color to the coffee bean). Maybe it should not have perfect outlines.... I don't know where to start.... can someone give me some advise how to do so and with what tools?!!!!!!