Select similiar direction

Rhino Rhino for Windows
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1

Is there a way to select objects with the same direction? For a 3ds max rendering it is important, that the sufaces face to the outside of the building but there are some how don’t. With dir command I can see which those are, but I wish I could select them all at once. Or give a new direction to all of them by selecting a center from which all normals face to the outside of the building?

thx in advance

2

You can set the displaymode to show backfaces differently this will help in selecting the faces that you want to be flipped.

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HTH
-Willem

3

I knew rhino has something like this. I just wasen’t sure how it’s name was. Thanks a lot