Using Eagle3D and POV-Ray, you can make realistic 3D renderings of your PCBs. Eagle3D is a script for EAGLE Layout Editor. This will generate a ray tracing file, which will be sent to POV-Ray, which in turn will eventually pop out the finalized image of your PCB.
Step 2: Create a POV-Ray file
After installing the required software, you need to generate a POV file that is read by POV-Ray. To do this, open up your board in EAGLE. Then, click File>Run. You want to find the install directory of Eagle3D, and find where the ULP files are stored (mine were stored at C:\Program Files\Eagle\ULP\Eagle3D). If you are running a version of EAGLE later than 4.1x, you'll want to select 3d41.ulp. If not, select 3d40.ulp. Click Open and a file generation interface should pop up. This is where you will make your selections on how the rendered board will look. I usually leave the settings to their default positions, unless I am using custom created parts. Then click Create POV file and exit. A message should appear telling you that your POV file has been created successfully.