[GRASS5] NVIZ - more bugs

[Glynn Clements]

Hamish wrote:

> in semi-related issues, NVIZ Image Dump to Max Res PPM is giving me a
> dark image again. I thought that Glynn had fixed this some time ago, but
> it is back again..

This is still relevant:

	http://grass.itc.it/pipermail/grass5/2004-August/015237.html

Calling Tk's "update" procedure in the middle of OpenGL rendering is
asking for trouble.

That may not be the only thing causing problems, but it is one of
them.

-- 
Glynn Clements <glynn at gclements.plus.com>