A new kind of extrusion...

[Dimitri]

It is easy to understand Micheus: you have a square face with an edge in the the middle of it (as is in the image on the left)... you select it, and you 'click' a, say, 'extrude trigonal' command... and, there, you have a shape as the one in the image on the right (as high as you want).

Try to extrude an edge in the same position (with the already existing edge extrude command, in the 'edges' menu) and you will see that it creates, two other edges in the two sides of the extrusion. The thing that I mean is extruding a trigonal shape (as is in the images) without creating more edges but only the two trigonal faces in the two sides of the selected edge's extremes.

I think that the image is quite explanative... think a little bit on it and you will understand it easily...