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    [Plugin] OBJexporter v3.0 20130131

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    • M Offline
      myreiko
      last edited by

      ty

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      • S Offline
        Saturo
        last edited by

        I have the problem that the OBJexporter sometime produces shading error like this:


        http://picup.oliverlamm.de/files/IMG_bf869069836ff46db79c3034ccec65c5_36mzFlCf85_Ok_small.jpg

        Any suggestions how i can prevent this?

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        • TIGT Offline
          TIG Moderator
          last edited by

          A little more info about what we are looking at, perhaps a SKP exhibiting the problem, or an OBJ/MTL/Textures ZIP ?

          Otherwise it'll involve wild guesses...

          TIG

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          • S Offline
            Saturo
            last edited by

            The issue can be easily reproduced.

            Build a face. Place two other faces on it an put another material onto these two faces.


            http://picup.oliverlamm.de/files/IMG_2b4a64df798c484b7f040deabc7e0c36_36mzFlCf85_Ok_small.jpg

            Save and export as .obj-file.

            Import in Blender.
            After remove doubles and limited dissolve you can see normals not standing in 90ยฐ on the face, which are causing these shading errors, i guess.

            [
            

            http://picup.oliverlamm.de/files/IMG_9415199a237946b96b06371ef659aea7_36mzFlCf85_Ok_small.jpg
            ](http://picup.oliverlamm.de/files/IMG_9415199a237946b96b06371ef659aea7_36mzFlCf85_Ok.jpg)

            If needed, i can upload the used files.

            best regards
            Christian

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            • TIGT Offline
              TIG Moderator
              last edited by

              Some examples files would be a very good idea - use ZIP for those non-compliant file-types...

              TIG

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              • S Offline
                Saturo
                last edited by

                Here are the test-files.


                Test-0.zip

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                • TIGT Offline
                  TIG Moderator
                  last edited by

                  The geometry is triangulated in the processing.
                  With this exporter and the Pro exporter as well.
                  Giving the face distortion you see.
                  It's not an option to NOT triangulate [unlike Pro exporter]
                  With no triangulation the distortion is not seen.

                  TIG

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                  • S Offline
                    Saturo
                    last edited by

                    This means no chance to solve to problem?
                    Using the .dae export the geometry is also triangulated but there is no face distorsion.

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                    • TIGT Offline
                      TIG Moderator
                      last edited by

                      This is an old plugin which is unlikely to be developed further.
                      Since the Pro exporter exhibits the same distortion issue with triangulated faces I expect it would not be easily solved.
                      Using the Pro exporter without triangulation sidesteps the issue but of course you may need triangulated faces for other purposes.
                      Why can't you use the native DAE Collada exporter ?
                      If that avoids the issue and you need an OBJ for some other reason does it export from Blender without distortion ?

                      TIG

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                      • S Offline
                        Saturo
                        last edited by

                        The Collade exporter works fine if the model has no texture.
                        I'm looking for a way to export objexts with texture and import it to blender.

                        When i use the .dae fomat the texture behaviour is very strang for example: textures dissapear when i join objects.

                        I was very happy when i found die OBJexporter because it exports the modell and texture very well. Unfortunally these distorsions make it unuseable.

                        Maybe i have to test the .stl exporter too.

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                        • S Offline
                          Saturo
                          last edited by

                          I build a model in sketchup. Then i export it as .dae file, import it in blender and use remove doubles and limited dissolve. After that i texturize the model.
                          In this step, I often find minor errors on the model which i can't repair in blender.
                          This means back to sketchup, fix the problem, export as .dae an so on.

                          Therefore i had the idea to apply the texture directly in sketchup where i directly can fix these minor errors and afterwards export it to blender. But in this case i had the problem that the texture in blender dissappears when i join objects to do remove doubles and limited resolve just once. Without that step ich have to do remove doubles and limited resolve more than a hundred times

                          This is why i'm looking for other ways to export the textured modell to blender.

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                          • F Offline
                            foxnadir
                            last edited by

                            @tig said:

                            @e0068675 said:

                            I cannot thank you enough for making this exporter!!
                            You have literally saved me hundreds of $$$$
                            == Donation ๐Ÿ˜ฒ

                            Hi, TIG!

                            I downloaded your exporter and now trying to get my SketchUp model to Octane Render scene. But it asks for OCS/ORBX files (or whatever). How to do that?

                            Thank you in advance

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                            • TIGT Offline
                              TIG Moderator
                              last edited by

                              Octane used to be able to import OBJ files.
                              I haven't used it for a long time.

                              It 'Opens' its own file formats- like OCS.
                              It 'Imports' other file formats - like OBJ.

                              Make sure you understand the difference between Open and Import...

                              TIG

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                              • C Offline
                                chanz
                                last edited by

                                Hi TIG,
                                Does this plugin do any sort of vertex welding? I am noticing that vertices are welded/combined somewhere in the import/edit/export process with the native SketchUp exporter. Of course for most people, it's a welcomed optimization but for me, I need to keep the vertices unique.

                                Thanks ๐Ÿ˜„

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                                • andybotA Offline
                                  andybot
                                  last edited by

                                  The first versions definitely didn't weld vertices. I recall vividly because it added extra steps for me when exporting. It doesn't look like any of those older versions are here though. You might find it floating around on the web in some older plugin repositories.

                                  http://charlottesvillearchitecturalrendering.com/

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                                  • C Offline
                                    chanz
                                    last edited by

                                    @andybot said:

                                    The first versions definitely didn't weld vertices. I recall vividly because it added extra steps for me when exporting. It doesn't look like any of those older versions are here though. You might find it floating around on the web in some older plugin repositories.

                                    Thanks for the reply. While I have you here, is vertex welding something that SketchUp does internally? I am having issues where I need to load an OBJ and then export the OBJ without any modification to the vertices at all. No optimizations for any reason as I render using texture arrays and need the unique vertices to set the texture index. I wrote a post in the main forum but nobody has replied yet. Figured I would ask.

                                    Thanks ๐Ÿ˜„

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                                    • C Offline
                                      chanz
                                      last edited by

                                      Looks like vertex merging was added in the latest version. Anyone know if we can find older versions?

                                      2.9 20130130 Merging of shared vertices is now optional, as it slows processing
                                      for larger models.

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                                      • andybotA Offline
                                        andybot
                                        last edited by

                                        @chanz said:

                                        Thanks for the reply. While I have you here, is vertex welding something that SketchUp does internally? I am having issues where I need to load an OBJ and then export the OBJ without any modification to the vertices at all. No optimizations for any reason as I render using texture arrays and need the unique vertices to set the texture index. I wrote a post in the main forum but nobody has replied yet. Figured I would ask.

                                        Thanks ๐Ÿ˜„

                                        I don't believe that is internal to SU. You might try using a different export format (like .dwg or .3ds format) and then convert to obj in a different app (like Blender or FreeCAD)

                                        http://charlottesvillearchitecturalrendering.com/

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                                        • G Offline
                                          Guihur
                                          last edited by

                                          Where i can find the OBJexporter v3.0 20130131?? i can't find it anywhere ๐Ÿ˜

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                                          • TIGT Offline
                                            TIG Moderator
                                            last edited by

                                            Please learn to do a bit more directed searching...

                                            There are hundreds of useful tools in the SketchUcation PluginStore...
                                            So try this: https://sketchucation.com/pluginstore?pln=OBJexporter

                                            Note that the very first post in this thread even includes a link to that very page !
                                            https://sketchucation.com/forums/viewtopic.php?p=294844#p294844
                                            i.e. the large button near the end of the post saying "Download"...

                                            TIG

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