advanced rendering for AutoCAD
Ok. So when I kicked up the reflective and refractive bounces in the advanced tab from 2 to 9 the black boxes seem to be disappearing. Seeems to be a bit of a performance penalty. Can you speculate wheater both have to be kicked up and how much? This rendering is only on its second pass so I assume the artifacts would eventually clean up.
Good find-- leave this stuff alone in the future unless you've got a good reason to change it. Defaults are 8 for refractive bounces and 3 for reflective bounces-- that should work fine here.
The rendering is better-- but something nasty is still going on.
Check to make sure the drawing units are set correctly.
Also, make sure that you're absolute units are not too large, such as "state plane coords". If they are you may need to move the drawing closer to the origin.
Quite likely that 5000' is killing you. Try moving the model closer to the origin.
I don't have a general "go back to defaults" button. Using the presets will reset a bunch of things, but not all of them. For combining artificial and daylighting see here. You might just want to press on with this one and see where it goes.
Also it seems the RPC objects are acting as daylight portals. I turned automatic off and they are on layer 0 with no material assigned.