Looks like we can finally do selective mesh decimation/simplification !
Not sure when exactly this got implemented (possibly last update), but looks like the combination of Reconstruction > Selection (Lasso, Rect, Box) with Simplify Tool effectively allows selective decimation.
Does that sound right or am I missing something?
I shall let links speak for me! 
https://support.capturingreality.com/hc/en-us/articles/360001192551-Version-1-0-3-3939-RC-Release
Thanks, Gotz.
I saw the new release page, but wanted to make sure.
Also figured it might be useful to have a thread going with proper keywords. Unless you dig into and analyze the release announcement, it’s not obvious that this feature is there 
Ok, I see your point.
Sorry, I should know by now that you’re not one of the post-first-think-later users!
Ha, I try to search first, but it is certainly easier and quite tempting to just post and see what happens.
Follow up question: With all these new tools, is there a way to get info on what’s selected? For example, let’s say a part of the model is selected; is there a way to get info on that selection (number of trigs, average edge length, etc)?
Great feature! Hoping it avoids having to use other programs to selectively drop that tri count down.
I’m finding I need to run the “Check Topology” and then “clean model” between each selective simply. I don’t fully understand what or why but I’m glad its all there
Hey Nick,
how do you figure out that you have to use it every time? What happens if you don’t?
Gotz,
I think Nick is referring to the system complaining if you try to simplify a model with “issues” (holes, floating trigs, etc.)
When I try to simplify, it gives a warning about potentially needing to check/clean. Haven’t noticed a difference in my results with and without cleaning, but maybe I didn’t look in the right places.
It’s hard to notice a missing trig in a 10M trig model
Correct Tim. I’m just glad the warning error can be rectified by the check/clean!
I can’t seem to find any option to see info regarding your selection area. That would be good so you can have an idea if reducing the selected area will have much affect on lowering the count on a model. Perhaps we post in the requested features?
Nick,
Agreed. It would be quite useful to get some basic info on selected area. Especially, number of triangles for simplification.
Request away! I’ll vote you up
Never seen this warning - is this a new feature?
I haven’t updated yet…
I’ve started seeing this recently. So probably one of the latest updates.