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    Sketchup and Miniature Modelling STLs

    Scheduled Pinned Locked Moved SketchUp for 3D Printing
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    • Dave RD Offline
      Dave R
      last edited by Dave R

      If you set the import units to meters the model will import as if millimeters are meters. and you'll be less likely to have issues with holes in surfaces. Rich's suggestion to use Skimp is a good one for simplifying the geometry after you have the .stl imported.

      Set model units to meters and leave the model at the larger size. When you export the .stl again it should be in meters but will open in the slicer in millimeters. Look at existing threads in this category to see some other examples I've shown.

      Screenshot - 2_15_2026 , 4_46_28 PM.png

      Screenshot - 2_15_2026 , 4_48_36 PM.png

      Etaoin Shrdlu

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      Dave RD 1 Reply Last reply Reply Quote 1
      • G Offline
        Grizzly256 Newcomers
        last edited by

        Ok, so i have got the 5 day trial version of Skimp, much faster importing STLs and no geomertry issues, just the 5 day limit is annoying.
        For some reason, when importing the STL via SKIMP, it comes out like this (see image). I cant figure why i cant find which settings to turn of to bring it back to normal.

        Tried the "set the import units to meters the model will import as if millimeters are meters.". Problem is, it doesnt give me an option to set the import unit when doing so. I just click File-Import-Select File-Import. I never get the option to set import units. Is this a limit of Sketchup 2017?

        Sketchup 1.jpg

        Dave RD G 2 Replies Last reply Reply Quote 0
        • Dave RD Offline
          Dave R @Grizzly256
          last edited by

          @Grizzly256 said in Sketchup and Miniature Modelling STLs:

          just the 5 day limit is annoying.

          It's not a free extension. If you need it and it saves you time, it's worth paying for. The alternative is to do what it does manually.

          @Grizzly256 said in Sketchup and Miniature Modelling STLs:

          it doesnt give me an option to set the import unit when doing so. I just click File-Import-Select File-Import. I never get the option to set import units.

          You can get the option to set the import units. After selecting the .stl and before clicking Import, click on the Options button.
          Screenshot - 2_15_2026 , 5_35_17 PM.png

          @Grizzly256 said in Sketchup and Miniature Modelling STLs:

          I cant figure why i cant find which settings to turn of to bring it back to normal.

          What's normal? Looks like you just need to adjust edge softening. Share the .skp file so we can see exactly what you are working with.

          Etaoin Shrdlu

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          G panixiaP 2 Replies Last reply Reply Quote 0
          • G Offline
            Grizzly256 Newcomers @Dave R
            last edited by

            @Dave-R Yeah, found the options not long after posting that reply, so bit of a face palm there.

            Skimp is bloody expensive though, for what it does, $299usd for a lifetime. Bit steep

            Will upload the .skp file here

            1 Reply Last reply Reply Quote 0
            • G Offline
              Grizzly256 Newcomers
              last edited by

              Sketchup 2.jpg
              UpArmoured Predator Hull WiP.skp

              1 Reply Last reply Reply Quote 0
              • Dave RD Offline
                Dave R
                last edited by Dave R

                You have the Softening/Smoothing set ridiculouslu high for what you're modeling.

                Screenshot - 2_16_2026 , 7_59_53 AM.png

                Select all of the edges and set the angle to 20°.

                Screenshot - 2_16_2026 , 8_00_52 AM.png
                There's a lot of unneeded triangulation in the model due to the face it starts from a .stl file. That's what .stl files are.

                BTW, if you plan to 3D print the other thing in your model you'll need to correct the face orientation. There should be no exposed back faces (shown in blue). The back faces are all to point at the print media. White front faces are toward air.
                Screenshot - 2_16_2026 , 8_08_33 AM.png

                You also have some other issues to repair before it is 3D printable.
                Screenshot - 2_16_2026 , 8_10_52 AM.png

                Etaoin Shrdlu

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                G 1 Reply Last reply Reply Quote 1
                • G Offline
                  Grizzly256 Newcomers @Dave R
                  last edited by

                  @Dave-R Thanks for that. For some reason the edge softening option is greyed out, so probably why i hadnt try to adjust it before.

                  1 Reply Last reply Reply Quote 1
                  • G Offline
                    Grizzly256 Newcomers @Grizzly256
                    last edited by

                    So, the importing of a STL in meters definetly helped the editing process, however i have found that when i exported the new model as a STL in stayed in its new scaled up version.

                    I tried this with chitubox, importing the newly created STL and the object was enormous.

                    Dave RD 1 Reply Last reply Reply Quote 1
                    • Dave RD Offline
                      Dave R @Grizzly256
                      last edited by

                      @Grizzly256 did you change the SketchUp model units to meters before exporting the .stl file?

                      Etaoin Shrdlu

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                      • G Offline
                        Grizzly256 Newcomers @Dave R
                        last edited by

                        @Dave-R No, i kept them to millimeters. I will try that now.

                        1 Reply Last reply Reply Quote 0
                        • Dave RD Offline
                          Dave R @Dave R
                          last edited by

                          @Grizzly256 said in Sketchup and Miniature Modelling STLs:

                          No, i kept them to millimeters.

                          I did include that information a couple of days ago.

                          @dave-r said in Sketchup and Miniature Modelling STLs:

                          Set model units to meters and leave the model at the larger size.

                          What happened when you export after setting the model units to Meters?

                          Etaoin Shrdlu

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                          1 Reply Last reply Reply Quote 0
                          • panixiaP Offline
                            panixia @Dave R
                            last edited by

                            @Dave-R said in Sketchup and Miniature Modelling STLs:

                            The alternative is to do what it does manually

                            Or maybe just use the free Universal Importer, which is perfectly compatible with Sketchup Make 2017 and it also include a robust decimation functionality powered by the MeshLab engine?

                            Link Preview Image
                            Universal Importer | SketchUcation

                            3D SketchUp Community for Design and Engineering Professionals.

                            favicon

                            (sketchucation.com)

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                            • L Offline
                              Luke147ll Newcomers
                              last edited by

                              I've been using blender as a catch all for 3d file formats.. a complicated mesh can get cleaned up in blender or simplified and export as a .dae into SU. I do this with OBJ's all the time

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