[Radiance-general] Understanding Limit Reflection

[Marcus Jacobs]

Dear Group

I am wondering if anyone could give me an in depth explaination of how the 
-lr parameter in rpict works? I have noticed that setting high can greatly 
increase computation time so I wish to find out how to better optimize this 
parameter. I know there was something in "Rendering with Radiance" on this 
but unfortunately my book is packed away in a box as I am moving right now. 
Does this parameter affect the ambient calculation? If so then how? When I 
read the description in the Radiance manual it simply says "Limit 
reflections to a maximum of N". Does this limit the amount of ambient 
bounces set with -ab? May I ask does this parameter deals with the virtual 
light source calculation only? If I do not have many (if any) virtual light 
sources is setting this value to 1 or 2 acceptible? Does setting this value 
this low greatly adverse to the accuracy of the calculation if there are not 
many virrtual light sources?


Regards

Marcus

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