okazaky wrote:Hm, are the walls made of one mesh or is every wall a single geometry?

one mesh as far as I know, used the Cindigo object export tag

although I have a feeling Bi-directional mode may fix this as the above test renders with BD mode don't seem to have this artifact

stay tuned - rendering now.... with BD and in path tracing mode

well I did a 30min render in Path tracing mode only and same thing.....

it did reach higher sample count numbers so does seem to be faster in this scene

attached

also some results of a test I've been experimenting with some parameters with this scene and a few others I found that max_change of 0.03 to 0.02 to be better than the default of 0.01 - resolves the noise quicker and with more detail large_mutation_prob with low values of like 0.01 to 0.001 slows do...

See the attached pic - note the edges of the box - will these artifacts go away with more rendering time? If not what's up with the artifacts? So far rendered in 30mins on my P4 Northwood 3.14ghtz machine. Models imported with Cindigo from C4D R10. Scene is lit by Indigo sky and sun directly above t...

here is another open source

http://sunflow.sourceforge.net/index.php?pg=gall

been waiting for something like this in ages! This is the kind of scene I like to render

I came across this one the other day - it uses java

http://www.radiumrenderer.com/

the sample renders in the forum>gallery look good