To fix flipped triangles

Attempts to unify orientation of all triangles belonging to common shells by their normals

The Status tab in the context view indicates whether the mesh is oriented properly. The number of triangles with an inverted orientation is reported on the Actions tab. By default, the outside surface of a triangle is highlighted light-blue and the inside is dark-red.

The repair action Fix Flipped Triangles sums, for each shell, the areas formed by triangles with opposing normal directions, and flips those triangles comprising the smaller of the two areas so that now all the triangles of a shell point either away from or towards the enclosed shell volume.

Flipped triangles are easily recognized by the red inner surface visible on the outside of the part.

1. In the context view, switch to the Actions tab.
2. Click Fix Flipped Triangles.
   Tip: You can also right-click in the display and choose Fix Flipped Triangles.