Export from 3DS to SKP - how to fix random extra diagonal lines & reversed faces?

[colin]

You could try the extension attached to this post:

How to make a selected face be truly flat

Colin, I’ve needed this function in the last week or so and decided to make a first try at writing a solution. The code is based around Eneroth’s flatten to plane, a bit of clean up code from Dan Rathbun, with maths from Emil Ernerfeldt. Fitting a plane to many points in 3D Usage: Select any set of faces and edges Click on the Extensions menu > Flatten to Calculated Plane The selected geometry will be collapsed onto a plane that represents a ‘best fit’ to the selected entities. Any edges i…

Download sw_flatten_to_calculated_plane.rbz, and install it with extension manager. You then get a Flatten to Calculated Plane option in the Extensions menu. Select the faces that really ought to be coplanar, then choose that menu item. Undo does work, if what it did wasn’t an improvement.