[Papervision3D] low angle distorts texture

[Ron Valstar]

I just noticed something strange, viewing a surface from a low angle 
stretches the texture.
http://www.sjeiti.com/test/pv3d/texturestretch.jpg
The image is the top view of a bunch of cubes. Look at the grey ones... 
the right pile (3 cubes) is ok... the left side of the top pile is 
stretched... the left side of the bottom pile is stretched partially 
(only one face of the top cube).

I doesn't really matter for me since you'd hardly notice in this case, 
but I just thought I'd mention it. (It could be an issue for large 
surfaces?)