In order to have branches where I need them, I just add them at the appropriate place by using a wire connecter, gluing the branch in place, and then sculpting wood putty over the joint to match the joints of the naturally occurring branches. I will paint the joints to match the natural surface later - right now they just have a base coat.
The base has a nice, shiny finsh, so I will sand the part that needs to be landscaped in order for the materials to adhere properly.