Amerio.Stephane Posted January 28, 2020 Share Posted January 28, 2020 Hello, I have *a lot* of legacy textured objects to import (>500). These are in wavefront OBJ format with their companion .OBJ.MAT file. Attached two objects with their Mat and Textures: objobj.zip obj/Manoeuvres: the obj and mat obj/Txt: the textures If I import the object by drag'n dropping the OBJ to a folder in the Asset browser, only the mesh is imported, not the material and the texture. But this is the only way I found to have a chance to configure the Importer (eg setting the axis) If I import all objects at once by dropping their "obj" folder into the Asset browser, then the mesh and textures are imported, but they are incorrectly assigned eg. MAT reference ../Txt/red.png but the material assigned will use "AnotherOne.png" in albedo. What is the correct procedure? Link to comment
silent Posted January 28, 2020 Share Posted January 28, 2020 Hi Stephane, To import .OBJ and get correctly assigned textures and created materials you will need to drag and drop both .OBJ and .MAT file to the asset browser simultaneously (or drop the whole directory). After that you can tune import settings and hit a reimport button. That's not an ideal pipeline, but this is limitation of FBX SDK that we are using. We have couple of ideas how to improve this behavior and probably the process will be simplified in the future. Now moving to the wrongly assigned textures. If you check both files you will see that they have overlapping material names: // MTL: slalom_8.obj.mtl and tracking.obj.mtl newmtl 0 newmtl 1 newmtl 2 // OBJ: slalom_8.obj and tracking.obj usemtl 0 usemtl 1 usemtl 2 By default meshes are trying to use already existing materials in the project, so when you import second mesh it will reuse the material (and it's textures) from the first imported file. To fix this you either can: Write tool for parsing and fixing overlapping names inside .MTL/.OBJ files (or fix them manually) OR Use material prefix in the asset import settings to generate unique material name: Final results: How to submit a good bug report --- FTP server for test scenes and user uploads: ftp://files.unigine.com user: upload password: 6xYkd6vLYWjpW6SN Link to comment
Amerio.Stephane Posted January 28, 2020 Author Share Posted January 28, 2020 Ok, I understand now! In my case, I think I will go with a script that simply rename the material in the MAT files. A small suggestion: "add prefix" could use an option to be either a fixed string (as it is now) or an automatic string based on the object name, so one could import a full folder (like I do), because the fixed string is only useful if you import OBJ one by one. Thanks! Link to comment
silent Posted January 29, 2020 Share Posted January 29, 2020 14 hours ago, Amerio.Stephane said: "add prefix" could use an option to be either a fixed string (as it is now) or an automatic string based on the object name Yeah, that one possible solution :) More likely it will be implemented in the future. How to submit a good bug report --- FTP server for test scenes and user uploads: ftp://files.unigine.com user: upload password: 6xYkd6vLYWjpW6SN Link to comment
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