Hi Steve,

> No there is not. There is an option to output "N-gons"
> which will produce an output of N-gons, quads and tris.
> Even Michael stated earlier that it is not possible to output
> without tris.

When you use "Output: N-gons" it outputs the underlying n-gons that were created by the refined surface intersected with the trimming boundaries, without doing any further tessellation of them into triangles.

The only way that you will get a triangle with that option is if the underlying surface fragment is actually a triangle itself. For example if you create a triangular plane, then that will create a triangle in that kind of situation.

But on any typical CAD model that will be pretty rare.

The n-gon option produces polygons that essentially follow the same topology as the original NURBS model - it has quads that follow the UV structure of the NURBS surfaces, and those quads are trimmed into n-gons where they intersect the trimming boundaries.

So for example in a case like the original block where there aren't any triangular trimming boundaries, absolutely no triangles are created:



If you have some utterly bizarre goal of wanting to have no triangles in the output mixed with n-gons, even when a even when a triangle is the most accurate thing to be created to fit on a triangle in the original CAD model, then I would suggest creating such meshes by hand in a polygon modeler - that will allow you to custom make the polygon layout to follow whatever particular odd goals that you might have...

- Michael