Double-sided mesh materials

 From:  Michael Gibson
811.4 In reply to 811.3 
Hi 3dvisuals dude,

> I thought you meant that the normals would be outward-facing in
> relation to both sides of an open mesh's surface.

One single polygon just by its nature has a "positive" and a "negative" side to it...

To make actual normals pointing on both sides would only be possible by having duplicate polygons in the mesh, with one having a reversed point ordering from the other.

Usually it isn't done that way since that increases the size of the actual mesh data, usually there is some kind of flag that you would set so that whatever is using the mesh should treat the positive and negative sides equally instead of skipping processing stuff for the negative side...

- Michael