Have you considered using genblinds? This may simplify things a bit and give
you more control over the number of surfaces. You could introduce an object
in Sketchup and substitute is afterwards manually or by using instances.
From: Marija Velickovic <firstname.lastname@example.org>
To: Radiance general discussion <email@example.com>
Date: Fri, 11 Nov 2011 10:25:40 +0100
Subject: Re: [Radiance-general] How to generate surface with gensurf
Thanks for answers,
After detailed analysis of lamellas' SKetchUp geometry, I decided to
simplify it a little bit - so I replaced curved parts with really small
radius with 2 polygons.
When exported number of surfaces per lamella is much smaller, and I still
get correct reflectances and overall blind transmittance, so I think this
simplified lamella geometry will work.
Since I need in building lots of blinds, so I'll surely use instances and
xform to put it all in building.