Step 3 is the coating of the core hexagonal system. VMD is used in combination with Blender to obtain a triangulated surface of the hexagon, which is used as input for TS2CG to generate a monolayer and a bilayer of the desired lipid composition for the coating of the hexagon. At the top of the hexagon the channels are open, hence a bilayer is placed at either end of the channels such that the hydrophilic headgroups of the lipids are facing both the open channels as well as the solvent. Along the channels the monolayer is placed, with the lipid headgroups facing the solvent.