Need help with a complex fillet

I have been able to get around all the limitations of Sketchup, but have never figured out how to do this. I’m drawing a steam locomotive that will get 3D printed. The area where a smoke stack or dome contacts the boiler or smokebox should be rounded. It is not a constant radius.

This is the stack: https://photos.app.goo.gl/btfKUig5JHiXm9z39

But it should wrap around like this: https://photos.app.goo.gl/MPmdwCgsvW1fCHdh7

How can I blend in this area?

Thanks
Chris

Do you want something like this?

Is there a way to install Curviloft without updating Sketchup?

You should be able to install the Sketchucation ExtensionStore tool from Sketchucation, which is required for license management, and then use it to install Curviloft and LibFreedo6.

So it looks like I already have Curviloft installed, says it was installed March 31 1924, but I cannot find it in any of the toolbars.

I wonder how it got installed in 1924. Maybe you mean 2024?

Do you have the current version of LibFredo6 installed? And as I wrote, you’ll need the Sketchucation ExtensionStore installed, too.

Sorry meant 2024.

I have LibFredo6 installed, says it was installed July 2nd 2020.

In all of the videos Curviloft has a little toolbar. I cannot find that.

That’s v10.9a, far from the current version of LibFredo6. As I showed in my screen shot Curviloft requires at least 14.3b. Install the current version.V16.1g is the latest.

Do you have the Sketchucation ExtensionStore installed, too?

Yes. There is a toolbar for Curviloft. It will appear if you have the current version of LibFredo6 installed.

The store is installed. When I log in I can find LibFredo6. I click install (even though it is installed) and nothing happens.

My try with native tools (Sandbox from Contours)

Well what the heck. I start up Sketchup 3 hours later and the Curviloft toolbar is there floating around.

What is with all the plug ins? Why not just release them as part of Sketchup so you don’t need 3 different accounts to try and download a fix?

So there are 3 functions:

loft by spline

loft along path

skinning.

What do I want to select?

And after that what do I do step by step? All the videos I watch either do not have any instructions or the guy giving the instructions doesn’t speak English.

I keep selecting all the edges (and that takes a while). Then I can either click the green or blue box. I try it either way and get a box that says “contours cannot be interpreted correctly. Empty the selection yes or no.” What does that mean?

And now everything I just selected I have to do all over again.

it means that the contours can’t be interpreted correctly, and that you can empty the selection, or not.

Curviloft | SketchUcation

https://www.youtube.com/results?search_query=cuvriloft

Curviloft

Well, you’re still using sketchup 2019 in late 2026, so it’s not like you were gonna buy a newer version of sketchup anyway.

besides, Annsi showed a solution that doesn’t require any plugin, you can do it with all the tools you already have.

Somehow I hit enter and it worked. I have no idea how to repeat those same results. But I got it to work.

Thanks.