The only truth is that 1 unit in Mudbox/Maya/3DS Max/Blender is 1 unit in UE4/Unity. You want meters as working units since your meshes seems to have been modelled like this to begin with. Try changing changing your settings in an empty scene and then open/import your mesh you wish to export. If you work in meters, create a 1x1x1 cube, then change to working in centimeters that cube object will be reized to 100x100x100. However if you have any objects in your scene when you switch application settings, these objects will be resized so that they are the same real world size as before. What you want is to have your application settings set to meters, and your export settings set to centimeters. Now from a quick google it seems Unity is using meters as default units, which would explain why your models import correctly to Unity and smaller to UE4. Working in meters a 1x1x1 cube exported as centimeters will give the same result as a 100x100x100 cube exported as meters. As you may know, our FBX Exporter addresses two common game-dev use cases: 1) white-boxing (or grey-boxing) a level in the Unity Editor, then switching to Maya or 3ds Max to complete the level with production-ready assets and 2) recording gameplay in the Unity Editor, exporting animation to Maya for an animator to polish, then returning to Unit. So if you’re working in meters and choose to export to centimeters, what the FBX exporter does it it multiplies everything with 100. What Mudbox does know is the ratio between meters and centimeters. Windows build with GLTF (extracted textures & materials): size 333mb, performance 310fps. Windows build with GLTF (embedded textures & materials): size 913mb, performance 310fps. Windows build with FBX: size 118mb, performance 410fps. However the FBX exporter has the option to rescale the object. I had a big city model (streets, buildings, roads etc) both in FBX and GLTF formats. A cube that is 1x1x1 units in Mudbox will be 1x1x1 units in UE4, Unity or whatever. UE4, Mudbox or FBX has no idea what a cm is.

I did some tests in Maya since I don’t have Mudbox, but chances are good the behavior is the same.įirst of all the units in UE4, or any other 3D engines, are not cm as much as they’re loosely assumed to be cm.

Unity fbx exporter size limitation