Hi guys, I have another newb problem.

I have a model and when I convert it to subd and try to render it with mental ray (draft default) the dragon head does not render and I get the following error message:

select -r polyToSubd1 ;
deleteInternalValence2Verts |polyToSubd1|subdTessShape1;
polyToSubdiv -ap 0 -ch off -aut on -maxPolyCount 1000 -maxEdgesPerVert 32 |polyToSubd1|subdTessShape1;
// Warning: Nothing is selected. Select objects or components to delete. //
// Result: polyToSubdShape1 //
delete |polyToSubd1|subdTessShape1;
// Error: (Mayatomr.Geometry) : polyToSubdShape1, non-quadrilateral face in subdivision surface base mesh not supported, ignored //

Maya software will render the head, maya hardware does the same thing as mental ray but gives no error message.


What have I done wrong? Is it correctable?

Here is a picture to help. The top one is the model converted to subd then rendered with Maya software. The bottom is the same model rendered with mental ray (draft).