Joined: May 18, 2021
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Re: Part of an obj invisible
That looks like a roof created by Dorin's awesome plugin, so it is an object. SH3D is not a modelling tool in any meaningful sense. So I'm understanding right that you want the dormer to cut a hole in the main hipped section? This is not possible in SH3D. What you will have to do is select the objects, export them as an obj, import that into a modelling tool, and edit it there. I can confirm that Blender works for this, but any tool that can import and export .obj files should work.
Italy
Joined: Nov 17, 2021
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Re: Part of an obj invisible
If you are generating the roof using the Roof generator plugin, you can achieve this result with a trick. Just draw the roof as in the following picture:
The dormer roof is just a texturized box with the proper inclination.