How can you force Slic3r to put a brim around all parts that touch

How can you force Slic3r to put a brim around all parts that touch the bed? I’m doing a print with two parts that will meet in the air. As you can see it only put a brim on one part.

ummm… that’s dumb of it!

Mine doesn’t do that - do you have some sort of Z-trickery going on? spiral vase mode? are the bottoms of those sections both at a true Z 0.0?

That shouldn’t happen? Is it a model of yours or online?

@Joshua_Marinacci have you tried to slice with Cura?

Lol…
sorry, just can’t count the number of times I’ve heard:

“I’m having a problem with slicer #1

“Maybe a solution to your problem is slicer #2

… BUT there’s a point to take in there - I use Slic3r AND kisslicer probably 50/50 because often I get absolute crap from one and the other does it nicely (actually, kisslicer always does it nicely unless a brim is needed - then slic3r sometimes wins…)

Most likely cause is that one item doesn’t quite reach true 0. It could boil down to a floating point error.

I think whosa whatsis hit the nail on the head.

Ah. I hadn’t thought if that. I’m not a CAD expert and I did a few dodgy things in my OpenSCAD model, so that’s very likely. I’ll report back.

Looks like the two sides were 0.1mm off. Fixed it. Print in progress.