[Radiance-general] filtering normal information from an obj

[Lars Grobe]

> grep -v '^vn' file.obj | sed -e 's|\([0-9]*/[0-9]*/\)[0-9]*|\1|g'
> 
> Seems to work ok on an OBJ file produced with Wings3D.

Yes, it seams to work here, too. Thank you! I will do some more serious testing with my obj's tomorrow.

Lars.