Hi Burr, so I guess what you would really want there would be for the fillets to just continue and meet each other in a sharp crease instead of it trying to put in a corner patch in that spot. I don't think there is any way to get the fillter to do that, but actually if you look at each fillet piece, they're actually trimmed back parts of a larger fillet like this:




Unfortunately they don't quite extend far enough to totally finish crossing over each other, so it doesn't quite work but you can see in the attached 3DM file how that could work if they just extended a bit more.

I think what you would want here would be a way to get a maximally extended fillet - that could be possible for me to add as an option on surface/surface filleting - that's the variation of filleting where you work between just 2 individual surfaces instead of picking edges.

- Michael