Developed Smectics: When Exact Solutions Agree
  In the limit where the bending modulus vanishes, we construct layer configurations with arbitrary dislocation textures by exploiting a connection between uniformly-spaced layers in two dimensions and developable surfaces in three dimensions. We then show how these focal textures can be used to construct layer configurations with finite bending modulus. 
Gareth P. Alexander, Randall D. Kamien, Christian D. Santangelo
cond-mat.soft