I am an architect creating 3D models of buildings. I prefer the autocad interface over all others I've tried, except for one major limitation- 3D models cannot be edited consistently in perspective mode (the program has a hard time finding the objects making up the model while in perspective view). Does anyone know if this issue was corrected in any versions of of AutoCad later than 2013 (which is the latest version I've tried)? I am trying to decide whether to upgrade my hardware and operating system to run the latest AutoCad (and whether to continue researching competing products).