@dave r said:
So what would that calculated offset be? Would it round over the entire selected surface or just put a radius on the edges? What would the calculated value be if more than one surface is selected and they are different sizes.
Really it isn't a big deal to set the offset or radius value manually for the job at hand.
It would be helpful when you test a plugin or anything else to have some idea of what you should get and reading the provided instructions goes a long way to tell you that.
Yeah, it's not a big deal now that I know what I'm doing. 
If anyone else tests out Fredo6's plugin and sees it doing something odd on the first run, they may not seek help. In turn they might give up without going in to change the offset. I just wanted to see what sort of job this plugin/script could do without getting further in to adjust things. Perhaps a first-time value that's something like 1/2, 1/4, or 1/8 of the offset selected would solve that new-to-RoundCorner confusion? After I went in there and set an offset the plugin remembers it, which is nice. In other words, once someone sees it work the first time, then they can play around with its adjustments to incorporate it into their work.
This plugin hasn't been updated in a while. Does it still work for the latest SketchUp version?
