[GRASSLIST:6182] 3d vectors in NVIZ

[Nick Cahill]

Trying to use NVIZ to visualize 3d vectors on a DEM surface. All works 
fine - the vector file loads and displays properly until I try to 
change the viewpoint, and then the lighting seems to disappear from the 
surface. The vector file still displays and is lit properly, but the 
surface is almost black. The 3d vector file was created in Microstation 
and imported using v.in.ogr - with no obvious problems. It's a very 
simple geometric structure, and the problem occurs even with the 
simplest 3d vector files. I'm using Lorenzo Moretti's binaries of GRASS 
6.0 beta 2 cvs, on Mac OSX. Has anybody had any experience with 3d 
vectors in NVIZ?

Many thanks

Nick Cahill