[PyMOL] black shadows on povray mesh2

[Suzuki, R. <rs...@af...>]

Hello,

Do you have any idea to calculate nice normal vectors that can be
rendered cleanly?

When I draw with povray using include files created by pymol, sometimes
black shadows appear on the secondary structures, especially in the
planes near perpendicular to the picture.

I removed the normal vectors and these shadows disappeared. But the
smoothing process between the triangles that make up the mesh2 objects
was also not performed.

I calculated the average of the unit normal vectors of the triangles
that contain each vertex and compose the same plane and set in place of
the original normal vectors, and the black shadows disappeared.
Smoothing also took place, but was less smooth than in the original
file. Also, some edges was emphasized compared to the original.

Thanks,

Rintarou