I have a birch tree wedding coming up in just a few weeks October 10th actually. and they want the cake to be done in buttercream. ANY ONE who has any idea on how to get the look of the bark to be realalistic in buttercream PLEASE I need some advice!!!!

Two CC buttercream birch wedding cakes:

http://cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1410583

http://cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1490629

HTH