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Flipping triangles in a 3D object
Since the triangles in a 3D objects are 2D planes, they have two sides like a
coin. When you draw a 3D object on a plant you can color each side of each
triangle with a different color. This is to represent real color differences like
that between the top and underside of a leaf.
Therefore each triangle on a 3D object has a direction that it faces, much as you would say a coin is facing up if the heads side is showing. We
call one side the front face and the other side the back face. Usually the front face faces up or to the inside, and the back face faces
down or to the outside, but not always. Don't worry about which face is which -- just try different colors until you get what you want. You can also set front
and back face colors to the same color if you don't want to show differences between faces.
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Updated: March 10, 1999. Questions/comments on site to webmaster@kurtz-fernhout.com. Copyright © 1998, 1999 Paul D. Fernhout & Cynthia F. Kurtz. |