[feynman]

When selecting polygons of an object in Studio to make a triangle group, it often works for one set of triangles (a surface) but not for another. Why could that be?

Example: A 2 Euro-coin - I can select the triangles of the inner surface, but then not the triangles of the rim. A book - I can select the triangles of the cover, but then not the triangles of the book block (pages inside).

Also, sometimes I click on a polygon and instead a polygon on the back of the model is selected; or in the Triangle Groups lister a previously named triangle group "Rim" has its name changed to the name of the assigned material. Very odd, these behaviours.

I can't find the Documentation or Knowledgebase sections that explain the various Polygon Selection and Polygon Selection Mode menu options and how to properly select and work with Triangle Groups.