She wants butter cream not fondant so I can't figure out how to achieve the shading on the top tier. Any suggestions greatly appreciated. She also wants only 30 servings but a two tier cake what size cakes would you recommend? Thank you

Sorry forgot to post the picture. http://s4.hubimg.com/u/2817651_f520.jpg

i would do a 6 and 9 inch cake. i think your best bet is to airbrush. thats the only way you're going to get that coloring on buttercream.

I agree that this looks like an air brush oversprayed top layer.

I don't use an airbrush on my cakes. Do you have any other ideas on what I could do. Even another decorating idea for the top tier would be great.

Anyone have a clue on how to achieve the bamboo?

I've seen edible spray paint at the local cake supply shop. Do they have anything like that where you are? Sorry don't have a clue about the bamboo