Darren New <dne### [at] sanrrcom> wrote:

> One thing to be careful of is if you're using actual shadow-casting lights
> instead of ambient or some such. If you build the entire building out of one
> object (e.g., a union of walls and floors), the shadow calculations will
> take forever. Each light will have to test every object in the entire
> structure for each ray cast.

Thats good to know but I am good so far. I am trying to be as simple as possible
in this project so am using only boxes and prisms so far. The only CSG is on the
creation of curved walls and also in my plan for windows and doors. I suspect
also parts of the roof. I have discarded the plan for using merge at
intersections also. Prisms work very nicely.

It is important to model most items as single items because of the information
management part of the tools. I need to know precisely where things are so that
a flat drawing (plan and elevations can be extracted later).

Thanks for the comment.

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