Alias 2026 Extend Undo

[mcgeecardesign]

Currently using 2026 Surface and I found a bug with the extend tool. When you undo an extend operation while in the tool, it duplicates the surface and sometimes sends one of the hulls in a wild direction. In my case it's with extrapolate and merge on. Haven't tried the other settings. It names this extra surface as "Extend #....." I have to delete it every time. The original surface will undo to the previous state just fine. 

[Fausto_Brevi]

I'm not able to reproduce the behaviour you describe.

I'm using AutoStudio 2026.0 and Extend seems working as expected (with extrapolate and merge on).

Please, could you upload a simple wire file with a surface that gives you that wrong result? Or a short video.

[mcgeecardesign]

So it's admittedly hard to reproduce. Some of my files do it, some don't. But I caught it once and explained below. Oddly enough in this instance it didn't happen when I turned layer symmetry off.

Surface from a model I have moved off somewhere. Layer symmetry applied here.

Extend, extrapolate and merge on.

Undo while tool still active. It creates a second surface where one of the hulls shoots off down to where the surface originated.

You can see it creates a second surface just called "extend".

If catch it again with any more clarity I'll post more. It's not a big deal, just slightly annoying.