Hi Radiance,

A really simple test would be to load the following cylinder file:

http://moi3d.com/forum/get_attachment.php?webtag=MOI&hash=db4239ff7598c1e3029b76f4090c7f19&filename=CylinderOctaneTest.zip

Every other rendering program that uses the vertex normals from the OBJ file for shading will render that as a completely smooth cylinder without any breaks between the different pieces.

Octane does not render it like that though, it shows breaks between the different cylinder pieces, which indicates that the cylinder normals that were stored in the OBJ file are not being used.

Either you're recreating them, or you're modifying them or whatever - maybe if you make a debug mode where you could display the vertex normals inside of Octane that would help me to point to one and show you that it is in a wrong direction.

Anyway, if you can't render the above file as a smooth seamless looking cylinder, it means you have some vertex normal handling problems.

- Michael