When you press the PrtSc key, a graphical copy of your entire screen is placed onto the clipboard.
This is a temporary copy. If you want to save it, you must then go into Paint.NET and press Ctrl-Alt-V followed by File > Save as...
Yes, it looks like this: :ColorPicker:
It only works within Paint.NET.
If you want to grab colors from other windows, just hit PrtSc, go into paint.net and press Ctrl-Alt-V. This will paste a copy of your desktop into a new image within Paint.NET.
Well, if you knew about SketchUp, why did you post this thread?
:?
Use the right tool for the job. When a carpenter needs to screw in a screw, he grabs a screwdriver. He doesn't try to change his hammer into a screwdriver just because his favorite tool is the hammer.
I would suggest, if you want to make 3D images, you research SketchUp by Google. It is a free 3D design software. It is very easy to use.
http://sketchup.google.com/
Paint.NET is not a 3D design software and it is not likely to morph into one.
Rick, I look at it this way. If we make good enough plugins, you (or Tom) might look at them and think, "Hey, that wouldn't be too hard to add to the code base." Then, everyone wins.
Just consider my code a Proof-Of-Concept and go for it!