Would you believe, I had never even heard of before this evening. I just downloaded the software (it's free, and it runs on either Mac or Windows), and started playing with it. This was my first picture.  I did the anaglyph effect in Photoshop.

I haven't even begun to learn all of Sketchup's features, but I expect this software will come in handy for future projects.

There are many good 3D models which other Sketchup users have made available. The woman sitting atop my Swell 3D logo is , by ArqDirk.