Street lighting lantern dome

SketchUp Pro
1

You (I think it was Dave) very kindly created the dome on this lantern canopy some time ago but I’m still not content that I have got it right. Looking at the attached photo (which is the best I can provide) there is definitely a concave arc around the bottom of the canopy. I’ve drawn what I think is a close approximation to the line of this arc but I can’t get it to reproduce right around the base of the dome in order to create something that is contiguous; and it needs to be made a solid component, too. Can anyone help here. This damned lantern has been the bane of my life for months now and I would so like to get it to a state that I’m happy to print it etc.

Many thanks.

Andrew

Lantern bowl0
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I can’t find how to attach files. Has that disappeared?

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Drag the file into your next reply here.

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Wardle Atholl
Wardle Atholl1392×898 145 KB

19 December canopy again.skp (299.5 KB)

1 Like
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Sorry for my ignorance: I’m sure it didn’t used to be as complicated as this posting and attaching files.

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You just did it the easiest way it can be done. You may want to delete the other similar thread to avoid double posting.

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Don’t worry about it.

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here @Quadhurst
here is the thread people are helping you in (on?)

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@Quadhurst

you mean something like this ?

Capture d'écran 2025-12-20 114934
Capture d'écran 2025-12-20 114934665×497 10.2 KB

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if, so, I used two plugins. one for convenience, the other too.

I used Select Curve by ThomThom to select the whole contour. If you don’t have it, then you need to select all the bits and lines manually.
(it requires TTlib to work)

then I used Bevel by Mindsight, but you could also use Fredo corner. as you see, it works both ways.

the alternative would be to to a follow-me :

Here, I draw the missing curve, then I select the contour (using select curve again), click on follow me, and click on the face.

Capture d'écran 2025-12-20 115548
Capture d'écran 2025-12-20 1155481132×709 36.3 KB

only problem is, I’m getting holes in the corners because of the “small faces” issue of sketchup. so in order for this method to work, I should have scaled up the whole piece 10 or 100 times beforehand (and simply scale it down after)

Overall the extension method is cleaner.

is this what you were looking for ?

20 December canopy monsieurnab.skp (1.3 MB)

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Ah. I’ve just seen this.

Many thanks for this but I don’t think it’s what I am looking for.

Here’s another attempt of mine to explain what I want to achieve: I’ve take the two middle edges of the dome - one along red and the other along green and created the arc that I think should go around the face of the base of the dome and neatly fuse into the dome so creating the line that is apparent to me in the photograph - a convex line from the top downwards and then a shallow concave line down to the top face of the canopy.

Kind regards and many thanks for trying to help me.

20 December canopy again v2.skp (1.3 MB)

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Its more complex than you think - you’ll need Curviloft or SubD\Artisan