[Radiance-general] Radiosity method implementation on Radiance

[Christopher Rush]

Is the intention to check if speed improvements are possible? It could be a lot of work for potentially little gain. Maybe there are already validation/benchmark studies that could show it takes X minutes to get within 10% of a known solution with radiosity and Y minutes to get within 10% of the same solution with Radiance.

Or maybe radiosity is perceived to be faster, but you have a scenario that your favorite radiosity software doesn't handle well? Maybe Radiance only handles the scenario of interest well because it doesn't use radiosity.

I suppose since Radiance is open source, there is a potential path toward implementing radiosity into Radiance - whereas most radiosity software (AGI, Dialux, etc.) would not accommodate a homespun version implementing a Perez sky for example or outputting an HDR image for use in evalglare.

Keep in mind that adapting Radiance to a radiosity method probably requires to ignore (or otherwise account for) the specular reflection component defined as part of any material type. In many scenes this may be unimportant.
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