A number of users have expressed interest in a faster version of Hidden Line. If its possible that OpenGL could be modified extensively enough to include things like wall stacking line omission and surface hatches then OpenGL could be a feasible replacement for Hidden Line in many situations. There are a number of items that users have requested be included in OpenGL: 1) Surface Hatches - Should display identically in size and alignment to Hidden Line and/or Renderworks modes. 2) Refl