I am using OpenFAST-V3.5.1. This version can output wave surface.
But I did not find options in Hydrodyn to set wave surface side length or the discretization. Thus, I am concerned if there are any variables to get the wave surface with my desired area.
Until then, the wave-elevation visualization is computed on a square grid that scales with the rotor diameter (the length of each side is equal to twice the rotor diameter).