resolve it. I deleted a interior cosmetic wall parrale to the exterior concrete wall. I think my problem is partially with the opening. The material properties of the wall opening could be default light source or glass, which do I choose? I think this is only part of the problem. I am accustomed to Revit 08 I got good images within 30 minutes, why did Revit change a good rendering engine? I placed it perfectly, but it seems to be limiting light. I just completed a test render and noticed slightly more light. Its still on the dark gray side, but lighter than the attached file which has the opening and cosmetic wall. The copied glass block row is on the south side. For setting I choose custum and checked portals for windows and doors. I am using fall equainox, (I tried spring and summer equainox also) ground level plan, relatative to project. I have made minor image adjustments. I choose a background color of pale blue, sky or anything else causes a black rendering (???????). The scheme is interior sun and artificial lights, even though there are no fixtures. I am very frustrated and spent 14 hours playing with the lighting. My walls are matte white, lite biege floor I greatly appreciate input. My test renders take 1.5 hrs. Wow, I am using a 2010 Asus Pent. 7. Do I need to expand my virtual memory or what? Again thanks for any help
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