[Radiance-general] rad -n and -N parameters / switches

[Lars O. Grobe]

> Hi, Lars, I'm using windows 7. Thanks!

I do not know about the locking capabilities in Windows. Anyone out here 
having experience with rpiece on Windows 7?

What is happening is that rad starts render processes. As these are 
supposed to share the ambient data (ambfile) to speed up the work, there 
must be a mechanism doing the coordination work on accessing this file. 
This is done using file lock (basically you need to make sure that one 
process does not write data while another is reading, but waits for the 
read to complete).

Cheers, Lars.