Extrude terrain to create a "maquette" style

Hey guys,

I have a challenge for you ! :wink:
I have a terrain which is a big surface made of triangles. It is not a plane since it has different altitudes, like a real map of the world. See the top part of the image.
I would like to create a “border” around it, to make it look like a small scale model out of concrete. See the bottom part of the image.


Any idea ? In my case it is not a rectangle shape for the cutout !

Thanks !

Like this? Try - https://extensions.sketchup.com/nl/content/eneroth-terrain-volume

Edit: works on irregular shapes too:

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You can use Stamp from the Sandbox tools with the offset set to 0.

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Note that even if you set the offset to 0, the sides of the stamp won’t be vertical. There is a minimum offset that is larger than 0.

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How many edges form the perimeter of the landmass? If it’s less than a few dozen, I would just manually draw vertical edges up from a ground-plane face to each perimeter vertex (using inferencing to locate the lower end of each such edge).

I think you should be able to accomplish this with Joint Push Pull (using vector or extrude?), and then slicing off bottom off with a flat plane. I don’t have time right now to do a test.

I figured it was so close, .025m that the average user could either ignore or know how to fix it. But …

Can it be negative? After all, the earth isn’t flat, so a chunk aught to have the vertical edges converge to the center of the earth rather than flare out. Ok jusdt kidding. Oh, no! Now I may have created an irresistible challenge.

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What I love is we can all chat about the existential chunks while at no time actually disturbing the original poster.

Ok, okay. Point taken. Here’s Joint Push Pull plugin method:

Hey Gys,

thanks again for your help !
I did use the Eneroth Terrain Volume tool, which is great and so easy to run, but ran into some issues for some part of my terrain.
Then I tried to Joint Push Pull plugin (from Fredo6, love this guy!), and managed to get what I needed. This last plugin is very fast in computing and has a lot of options, it is great !

Mission accomplished, thanks again and again.

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