Verify that you have selected the appropriate Daylight Portal options for sunlit interior renderings.For example, if you select the scheme called ‘Interior: Sun only,’ you will not be able to select any artificial lights fixtures. Keep in mind that you can only select Artificial Lights when a Lighting Scheme contains Artificial Lighting.
Verify that your Light Groups are turned on with a checkmark and that dimming is set to 1.For example, if you select the scheme called ‘Interior: Sun only,’ you will not be able to render your view with any artificial light fixtures. Verify that you have the appropriate Lighting Scheme selected for your view (Revit offers six Lighting Schemes).If your renderings in Revit are too dark or completely black, you should look at some key lighting settings to determine if they are the root cause. After spending a considerable amount of time perfecting your settings and running many test renderings, nothing can be more frustrating than having lighting issues. What causes this, I really do not know! Certainly try some of the Autodesk tips as I believe it may be linked to some of these, but I can at least now render in Revit without things disappearing.If you have spent any time rendering, you probably have discovered that the entire process requires a lot of time and patience.
Deleting your user profile and recreating a new one, seems on the face of it to cure the problem. So moral of this story is, if you discover this issue the chances are that your user profile may be corrupt. To my surprise the materials rendered fine under the new profile and Revit was happy again. Then I had a sudden brain wave ( I don’t often get many! ) I created a new local profile on my laptop and to see if it was affecting all users. I even went really extreme and completely uninstalled RAC 2011 with the VBS script which is on the Autodesk support pages, cleaning the registry, then reinstalling RAC 2011, testing without sp2, then adding sp2, uninstalling and reinstalling the protein material library yet again! But no difference. I also tried all the tips here of uninstalling and reinstalling the library but this made no difference……
I tried installing the Revit 2011 hot fix which updated the “ .fbx” file, but this didn’t resolve the problem, however I still think it may be linked to this.
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