And really the main thing that I think it would be mostly used for is actually boolean union, not so much for boolean difference. More for stuff like this where you've got a thin walled object:




And then you want to union on some other piece such as this:




But you don't want to include the piece of the handle that's sticking into the inside of the bowl, you only wanted the part going to the outside. Previously to get that you'd need to do some extra prep work steps on the handle to carve off some of it before you would be ready to do a union of it. With the new face subset booleans you can select the handle and then select just the outer face of the bowl and get this result with just one Union operation:




So anyway that's the primary use case. I figured might as well make it work with boolean difference as well because it could be convenient with similar thin walled objects to only cut some spots and not others. But still a cut with a curve is meant to cut all the way through those pieces.

- Michael

ok, thanks. Just a side affect and not really something coming in the future... (well, besides the depth limiting thing your thinking about....)

The extrude faces is working well :)

Hi Michael,

I've just tried to create something similar to your example above, but Boolean Union doesn't seem to work after selecting the bar and the outer shell of the cup-like solid.

I've attached the MoI file.

Thanks,

Metin

Hi Metin, thanks for attaching the problem file. That seems like it should work, I'll investigate why it isn't.

- Michael

Hi Metin, it seems to be getting confused when there are some vertices (ends of edges) right in the intersection zone.

I'll investigate it some more to see if I can make that work better, in the meantime if you rotate your sphere piece in the front view by 90 degrees (as in the attached example file), it should then work ok.

- Michael

Thanks Michael. Glad I could give you a pointer to a possible problem case for the new face Booleans.

Hi Metin,

> I've just tried to create something similar to your example above, but Boolean Union doesn't
> seem to work after selecting the bar and the outer shell of the cup-like solid.
>
> I've attached the MoI file.
>

I've been able to investigate the case you posted, and I've got it fixed up so it will work properly in the v3 final version.

It had to do with some additional processing happening with coincident surfaces (the 2 overlapping planes in your case here) that could end up making some intersection results outside of the subset area, confusing the boolean mechanism.

Thanks for posting the problem file!

- Michael

You're welcome, Michael, and great to read that it'll be fixed in v3. And a tap on the back of the current MoI for not crashing or freezing in such a case.