Hi, and welcome!
Your question: Even modellers that use quads (like LW) render them as triangles... quads are just neater way to show your meshes, but they are internally always triangulated.
I usually keep my meshes as quads and just only before exporting / converting triangulate them... and after exporting / converting undo the triangulation.
More info:
http://www.beyond3d.com/forum/archive/index.php/t-12703.html
Your question: Even modellers that use quads (like LW) render them as triangles... quads are just neater way to show your meshes, but they are internally always triangulated.
I usually keep my meshes as quads and just only before exporting / converting triangulate them... and after exporting / converting undo the triangulation.
More info:
http://www.beyond3d.com/forum/archive/index.php/t-12703.html