I love this cake by MakisCakes! I can't get the attachment to work, but it's the picture halfway down. http://www.cakewrecks.com/home/2011/8/7/sunday-sweets-taste-the-rainbow.html I'm guessing I can recreate the balls using 2 half sphere cakes, but how do I achieve such a beautifully smooth fondant look?

Maybe they are dipped in chocolate, like giant cake balls?

How about poured fondant

I found some older threads about this same cake and some similar ones here on CC. It is rolled fondant. I guess getting it so perfect is where the art of cakes comes in! Most people seem to have covered theirs in buttercream then fondant, but I don't think I can get perfectly smooth buttercream on a ball. I'm wondering if ganache would work under the fondant. Not entirely sure how to cover a ball in ganache either though.

I found some older threads about this same cake and some similar ones here on CC. It is rolled fondant. I guess getting it so perfect is where the art of cakes comes in! Most people seem to have covered theirs in buttercream then fondant, but I don't think I can get perfectly smooth buttercream on a ball. I'm wondering if ganache would work under the fondant. Not entirely sure how to cover a ball in ganache either though.