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EdyJ / blender-to-unity-fbx-exporter

FBX exporter addon for Blender compatible with Unity's coordinate and scaling system.
MIT License
1.01k stars 105 forks source link

Include the option to change the geometry smoothing #52

Open Smash-ter opened 1 month ago

Smash-ter commented 1 month ago

Current issue with the exporter with Blender 4.2 is how geometry smoothing effects blendshape normals when they are set to "Import" in Unity. In blender the default option in the regular FBX exporter is set to Normals Only. This will result in Blendshapes being exported with sharp edges and split normals in places where they're not supposed to be split in. Below is an example of the problem I'm experiencing. image

The solution would be to change the geometry smoothing option from "normals only" to either "Face" or "Edge," which will fix the unintentional sharp geometry and properly recalculates the blendshape normals when set to the "Import" mode in the FBX import setting in Unity. Reference to the fix is below. image

EdyJ commented 2 weeks ago

Could you please upload a .blend file I could use for testing and verification of the fix?

Smash-ter commented 1 week ago

@EdyJ this model has two blendshapes. Only thing you might need to do is slap an armature on it, but when testing the import settings in unity have your import settings set to this image This is causing issues with regards to generating sharp tangents due to the "Normals Only" option from Geometry smoothing. Blender may fix this in the future, but having the geometry smoothing options exposed in the plugin is something that might help with this problem for the time being Whopper.zip