Export selection as separate mesh model

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Pjotr van van Schothorst

• April 30, 2019 09:15

For my application (architecture visualization) it would be very useful to have the option to export a selection from a mesh. I know you can do this approximately by filtering the environment away so you make a new component. But I need t have the original model with a hole of the selected area, whereby the hole and the separated area fit exactly. Now, I can only do this approximately as I have to make the same selection again in the full model to filter out the selected area to get the hole. You can see the result of this in my video tutorial, at 16:05, you also see that this workflow does not lead to the best results.

Of course, exporting the selection of a mesh means that you will get the large texture of the whole model, which is a lot of wasted texture space. But in my modeling/visualization software, I can make sure that the same texture is used for the whole model and for the selected export.

An alternative solution would be to preserve a selection, so you can use exactly the same selection for both the smaller part (with an Invert Selection) and for creating the hole in the original model. That would be even better, as in that case, you can re-texture the smaller part, and still have it fit exactly in the hole.

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  Götz Echtenacher

  • April 30, 2019 10:05

  Hi Pjotr,

  would it not work for you to save a reconstruction region as the basis for sselection?

  Of course, that would only work for simple geometry...

  But I have also come across similar problems and wished I could save a selection.

  So +1 from me.

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  Pjotr van van Schothorst

  • April 30, 2019 10:10

  no, what you can see in the video, I sometimes need to make quite complex selections. A Reconstruction Region is way too coarse.

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  Götz Echtenacher

  • April 30, 2019 10:20

  Sorry, didn't watch it yet.

  Another thought, which might or might not work:

  The selection can be undone using ctrl-z, so if the history survives the filtering process, you could export one model, go back to the last selection, invert and then filter again.

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  Pjotr van van Schothorst

  • April 30, 2019 11:37

  That does the trick! Great idea, thanks! I'll describe it in a next tutorial (too late for this one).

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  Götz Echtenacher

  • April 30, 2019 11:56

  Excellent !

  Just one of many features not properly described in the manual or tutorials.

  I was really thrilled when I discovered it by accident...   ;-)

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  Lucia CR

  • May 03, 2019 13:57

  hello, there is also an undo/redo icon next to the layout icons

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