advanced rendering for AutoCAD
It's actually a pretty good image-- I left it in the gallery as well.
If you're willing, upload the model to me and I'll take a look at it. Otherwise, I can guess at some of the problems but I don't know for sure. Include any necessary comments or instructions when uploading.
I didn't have your HDRI, so I just used the standard lighting for this one (Daylight Interior preset.) Lighting the model this way, the color of the skylight and the color of the walls both contributed to the "blue" cast. When I made both of these more neutral, using the Path Tracer for a few minutes I got the following:
The lights have some problems.
First of all, the way you modeled them isn't working. I would place a 3d face in the widest part of the luminaire and tag it as an area (diffuse?) light. Make sure you aim the light so it points up. Second, you'll need to put accurate values in for the intensity of the lights-- 100 foot long luminaires cast much more light than 100 watt incandescent bulbs. Speaking of which, if you're not going to use the path tracer I would definitely break those up into smaller pieces-- you'll still need to let this run quite a bit to get convergence.
Third, the daylighting can easily overwhelm this sort of lighting. (It depends quite a bit on your HDRI.) This phenomenon is accurate, BTW-- but if you still need to visualize your lighting you should probably put the daylighting and interior lights on different channels. Just go to Advanced Lighting and change the # of channels to 2. That should take care of it automatically.
I adjusted my rendering to the interior daylight and it turned out a lot better than before, I am still working out the lighting situation but the rendering itself is looking a lot better. It is a little brighter than I want, but I can play with that. I attached the progress picture. I also attached the other view and I am still getting some odd lighting affects and I don't know where they are coming from. It looks like I have spotlights shinning up from the base on the left and on the actual light fixture around the perimeter. my interior lights are turned off, where are these things coming from.
All in all the quality and "sun" lighting are exactly what I need to see. I am just having a couple of the same issues.
Thank you all for all the help thus far.
Check the INSUNITS system variable-- some how it got set to 0 in your model. It should be set to 1 (inches). This should take care of these indirect lighting artifacts. Sorry I missed this the first time, but the ACA UNITS command reported the units correctly. The orginal AutoCAD DDUNITS command does show the problem. I'm not sure how a drawing gets into this state, but it is troubling. Jan was correct about the units problem.
Try the Path Tracer for this when you get a chance. It's the sort of interior that should converge pretty quickly and the quality may be a bit higher.
Render at the lowest res. possible. Experiment with upsampling using PhotoShop to see what you can get away with. Other than that, you'll need a faster machine.
You'll still get decent results with the other engine, and it might be faster-- particularly if you're not trying to simulate the lighting troughs. Make sure you get the INSUNITS correct, though.
In my opinion RPC objects need to be done very well or omitted. Because when they are done poorly they impact the overall rendering.
People seem to be lighted correctly but do not cast correct shadows.