"""""""Hi, BurrMan. Is your method different from the approach Phiro suggested? Does "its base curve" refer to the red profile?"""""""

Yes. I finally got a chance to download your file and found a small anomoly in one of the original surfacves, so I made a quick vid of me fixing it, but I didnt get into depth. Just showing a quick fix when a solid had "Naked Edges"

The area at the "red profile" on your zig surface had a couple little sliver surfaces that prevented it from becoming a solid (You see it in the video)

As a quick fix I just deleted all those planar surfaces and ran Planar which replaced everything. If you started by running "sperate" and just deleting single surfaces, you will see the little sliver.

Anyway, just for you to view what I did to your model to generate the bottom half you were looking for...

Phiro, I see that I can create solids without "Boolean | Union" by using "Edit | Join"!
In Loft and Extrude, I had to join with "Boolean | Union", so is it possible to say that the surfaces are more well-formed, or "well behaved", compared to those?

BurrMan, Thank you. I had always wondered why some solids require a Union and others can be done with a Join.
This video has melted that question away.
The command used at 0:17 and 1:03 is "Highlight Naked Edges", correct?
If I want to get a solid and I get a Joind surface, I will actively use this command to investigate.

marzRX

Hi MarzRX,
Yes, naked edges. I have it shortcuted so you didnt see me type it. Definitely a go to for “why not a solid”

Boolean vs Join

The way i would view it is boolean for solids, join for surfaces (that are edge to edge) if surfaces overlap in the middle somewhere, you would want to “trim” first.

Boolean is actually trim-join-remove rolled into one. So it “CAN” give results with surfaces, but just not the habit to create.

BurrMan, thank you. When dealing with surfaces, I'll first try joining with "Edit | Join".

Thanks to everyone's help, I was able to create the model. Thank you.




It's not quite the shape I wanted yet, but I've learned a lot in the process.

marzRX