So now I wish I would have forgone purchasing Alibre and just took that money and spent it on the full version of KeyShot, so that I could just export STEP from TurboCAD and bring into KeyShot. But I am still dreaming of a KeyShot add-on for TurboCAD. Probably as much chance of that as winning a lottery so I suspect it just remain a dream. I'll stop posting here soon, since it is pretty far off topic, but I wanted to post this one for comparison to the dark stairwell I had done in TC - LigthWorks. The real nice thing about the lighting here is a user can actually just select the light lens and make it into a lit object. I know that RedSDK has some additional lighting techniques that LightWorks doesn't, but I don't think it is as easy a this. I think one must still place a flat object by the item then want to light in Red and apply the lighting to that object. This dark stairwell looks great full screen but I only attached a small version here. This render took an hour (3750 x 2100, 300dpi, 150 Samples), but it is worth the wait when you know the render will be great.
PS, I still plan on trying an interior / exterior architectural scene to see how that compares with what I am used to with LightWorks so watch for t hat at some point.