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Importing FBX files in Unity with the correct scale, rotation, and axis is fraught.
FBX files seems to be in cm by default, but can support other units. Other unit scales are achieved in FBX by by setting GlobalSettings→Properties70→UnitScaleFactor
property in the file. For example, when a 1 meter cube in 'meters' should be stored in an fbx file like:
- GlobalSettings->Properties70->UnitScaleFactor = (100.0) # The 'unit' is 100 * 1cm - CubeObject - Lcl Scaling = (1,1,1)
This file will show up, in Unity's importer as
In order to achieve the above scaling (scale of 1 on objects, UnitScaleFactor=100), you must use one of the following setting for Transform→Apply Scaling
: