I'm guessing that you have mistakenly created a composition using the ray-traced 3D renderer. Go into the composition settings and change that.
If that's not it, we need more information to help you. Please provide answers to all the questions listed here, paying speciall attention to requests for screenshots:
No, I am using a Classic 3d composition. And my graphics card is not on the list of supported hardware, so I can't even choose Raytrace GPU as an option.
I am on WIndows 7 Ultimate, After Effects CC 188.8.131.524 which I believe is the latest update.
I have an i7 with 8 cores, hard drive is an SSD, nvidia driver is 327.23.
There is no external/3rd party hardware.
The source footage is only solids.
I haven't used After Effects on this computer before.
Quicktime 7.7.2 is installed.
No other software was running at the time.
There are no 3rd party effects installed.
Are there any other ideas about what the problem could be?
> I am on WIndows 7 Ultimate, After Effects CC 184.108.40.2064 which I believe is the latest update.
No, it's not.
Choose Help > Updates to install the After Effects CC (12.1) update.
I'm having the same problem after updating to 12.1
Why is your composition's preview mode set to Fast Draft mode? That's only for the ray-traced 3D renderer, and you said that you weren't using the ray-traced 3D renderer.
When I took the screen grab, I was checking through all settings for displays to try them all.
I get the same problem when setting it to Adaptive Reolution or Final Quality