I have a wedding in June that I am making the cake for and they want a cake with this texture:
Any ideas on how to achieve this? It looks more detailed than a simple spatula technique.
For this cake I put the BC on in a rough coat with a spatula mixing the two colors right on the cake, then used a fork to create the crenellation of the "bark".
That was a small cake (6 in). The effect you are looking for would be more easily and more realistically done by putting on one coat of buttercream. No need to over smooth it. Then use a round tip to apply scattered vertical strips of buttercream, some shorter, some longer and with varying intervals between them. Finally, use the tip of your spatula to drag the buttercream up and down with light pressure so you don't smooth it too much. HTH and post photos when you're done.