I'm having a problem with my buildings I'm exporting out of Revit, and am trying to figure out where the problem is coming from. I'm hoping someone out there can help me out a little with this issue, for I don't understand enough about Radiance to really know why this is happening, and can only guess at why.
Just for the record, if I make a model from scratch using textfiles I don't have any of these problems. Additionally, the problem crops up whether I'm using Radiance on Cygwin, OS X, or Mandrake Linux, so it's obviously something I'm doing or a problem with the models coming out of Revit.
My problem is the fact that my buildings all appear as if they are 'glowing'. Things like the site, and any Radiance-created objects or instances render correctly, however the buildings, especial the large flat surfaces such as walls and such, almost appear to be glowing because they seem to be bouncing so much light off of them, almost as if they are made of perfect white gypsum in broad daylight.
The material definitions for the walls aren't set too high, the colors are typically .8 or .7 for the RGB values, and the roughness is usually set to .15 or so- both values that don't seem too far off. Also the Exposure for the scene tends to be about right for other Exterior Radiance scenes and the sun is a simple Gensky straight from the first tutorial file. Yet however the building will be bouncing almost twice the light off of it of anything else in the scene!
The way I get my models from Revit to Radiance might be the key to why the models are behaving the way they are. I export the models to a DWG file that I then bring into AutoCAD and then use RADOUT to produce the models. However there are issues with this, for RADOUT or TORAD don't work quite right in the latest version of AutoCAD that I'm using. I've tried to use dxf2rad, but it always seems to choke on the models. They are very large, very complex, and have many surfaces. So I'm wondering if that's the root of my problem; is something in the export process possibly causing this?
Thanks for your time,