Projected Perpendicular snap is NOT Perpendicular

Rhino Rhino for Windows
,
9

Hi Jeremy.

Thank you for describing what is the problem with my model.
Especially your video does help me to understand why is that.

So, your points is :

  1. Project Perp snap is not recommanded, using Apparent Intersection instead.
  2. Run _4view two times to straghten views.

and here’s are few simple question.

  1. What Osnaps do you prefer to turn on while you modeling in 3D? I’m using End, Near, Int, Perp, and Project : and I’m not gonna use Perp anymore according to your advices.
  2. Is there any chance to straighten whole model even when I realized the model was slightly wrong later?
  3. When should Run _4view be used?
  4. I set F buttons as a shortcut to change view like F1:Top, F2:Right, F5:Perspective… Could it be reason of this kind problem?

Thank you.