CShake schrieb:

> my radiosity block:
> pretrace_start 0.08
> pretrace_end 0.01
> error_bound 0.2
> count 150
> low_error_factor 0.5
> minimum_reuse 0.01
> recursion_limit 2
> nearest_count 4
> 
> 
> I'm thinking that I could up the error_bound and make it faster, but the 
> count is needed for the amount of media, and the recursion_limit is as 
> low as I want to go with all the reflection.

Some things to note here:

- Radiosity probably does not contribute very much to your scene. You 
have lots of reflective surfaces, and the others are quite dim. There is 
not much diffuse interreflection going on here, so quality on that is 
probably not an issue.

- error_bound 0.2 is insanely low.

- make it a habit to always set "always sample" to "off". It really 
doesn't help at all (except if you want to provoke artifacts).

- recursion_limit does /not/ specify the "max_trace_level" to use for 
radiosity sampling rays. Instead, it solely governs whether 
radiosity-based illumination will be taken into account recursively, and 
to what depth. Aside from that, radiosity sampling rays are treated 
pretty much like normal rays, i.e. the number of classic reflections 
they will follow is governed by the global "max_trace_level" (with some 
caveats, but that's a different story). Given that radiosity probably 
contributes very few to your scene anyway, the "radiosity effect on 
radiosity" will be pretty close to zero, so you can set this value to 1.

As a matter of fact, radiosity contribution is probably so low that this 
is one of the very few scenes where I'd personally try to go completely 
without.

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