Lofting a rectangle to a circle along a curve of 90 deg

[Xdrakosha]

We’ve already been through all of this in the topic about cooling for the 3D printer.

Or that wasn’t you?

Lofting between two faces

I’m trying to create a loft from the tip of my cooling duct to an inlet above it. I’d like the loft to follow a smooth curve. I’ve watched every LOFT tutorial I can find, and they all seem to show how to loft between planes (circles, rectangles etc). But I want to loft from my duct exit to its entrance. And I can’t for the life of me figure out how to do it. Here’s my current cooling duct. Currently the duct travels vertically, and then sweeps outwards in an arc. I want the arc to begin a…