While clean, smooth icing is the epitome of timeless elegance, modern wedding cake design is definitely in favour of a little texture too! This may be achieved using a variety of techniques, my favourite being stencilling and textured lace as I think these are most appropriate for wedding cake design and look incredibly elegant.
Here is a closer look at Roses and Vines, where the white-on-white stencilled pattern really helps to add texture and interest to the design: