cleaning geometry

[breadbox]

im getting some bad faces when i export to an obj format. I re-import the obj into houdini and i can see that the faces are bad in the obj so its some last step i must be missing to create a clean model to export. everything looks fine before the export (except that i have one single face with a billion ngon!)

here is the mesh comming from houdini, just after the resample and the polyspline.

http://i245.photobucket.com/albums/gg54/bradonwebb/geo_to_export.jpg

here is the obj

http://i245.photobucket.com/albums/gg54/bradonwebb/Bad_GEO.jpg

you can see the face that sort of cuts through

so i tried to use a triangulate 2D but it flattened everything down to one plane?

http://i245.photobucket.com/albums/gg54/bradonwebb/bad_triangulate.jpg

so what sort of cleanup node would I use to export this model as a clean obj for use in another package?

[breadbox]

One way I did find was to use the divide node to triangulate.

that seemed to work, but produce some nasty triangle meshes. it might render out ok, but id like to find a cleaner way to export with the triangle2D node as that seems to produce more regular shape polygons.

http://i245.photobucket.com/albums/gg54/bradonwebb/divide.jpg