i've a question:
see the image below (in particular the eaves)
i used physical sky as enviorenment, and i loaded the exterior high preset inside the menu of brazil,to rendering my image!
but...what're all those strange circles?
i think are caused by caustics...so i deselected the caustic option in brazil,through the menu and inside the materials option...but i don't able to resolve
Can you post just the surface of the building in a 3dm file for me. Make sure the circles are still there when that's all that is in the file. I agree it looks like a photon artifact but I would also look to see if you are using the environment color for the skylight in the luma server. I have seen some instances where this will produce circle spots like this when GI is calculated for the skylight. If that's not the issue, I'll know more by looking at the settings.
Is this the material you mentioned? http://brazil.mcneel.com/photo/coppershiny-1
You can also just post a version of your model that has the eaves and the wall. That way I can see your settings, lighting and anything else that might play a part.
i think i solved my problem!
the artifact in that scene has been caused by an option in brazil.
this option is render cache
if i set off the render cache,my final image it's ok,see first image below
in the second image,i set off render cache and i actived also the irradiance(that i set off in the first image)
sorry,but i'm here again...and with the same,identical problem...with these horrible circles inside my render!
but now...i know the cause:"it's the material used for gutters and rain tubes
that material is Copper_Scratched,downloaded from this site several months ago!
what can i do?to delete the circle using this copper type? could be a strange setting inside material options?
i just deselect "generate caustics" from the option box...
You could try using this simple copper material instead of that one. I started with a chrome material and then enabled glossy reflection and changed the filter color.
thank you Brian...
i solved following your idea!
i started too with crhome material...and after i modified some parameters!
the circles,seem disappeared!