I drew the pods and used sweep to rails to created the lumps for the peas. then created a flat raised relief of the outline of the letter then added a domed relief of the letter "P" to the raised flat relief.
I then shaped the outline of the letter using a faded bitmap.
This bitmap is black and fades to white and back to black, when you apply the bitmap to a relief the hieght you give it basically leves the black alone and raises the white by the amount you set for the hieght, the greys taper from black to white. In this case I gave it a drastic hieght and the result was a pretty dramatic wave apperance.