my first guess is that they had the different colored frosting in piping bags and piped the colors in blobs all over the cake. then, when it crusted, they viva'd it...and while doing so, it caused the colors to bleed into each other a bit, but not too much, so one could still see the different colors. that's how i would do it probably!
I agree - pipe then Viva. I did this for a zebra striped cake and it turned out really well!
I agree....with the other posters.
OHHHHHH Niliquely...could you post a picture of the zebra cake? I have never seen one done with that method before...
Someone posted a Tutorial on here on how to do it, and it makes alot of sense and its very good explaining with pictures.
basically you pipe out each color in different odd shapes as close as you can to the next one, and then get a paper towel and use that method and the colors bend together....
I attempted a camo using fondant. I just kinda rolled my colors together and then brushed with petal dust to give the fading into each other effect. The pic is in my photos.