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Imported FBX files are 100 times too large

As of at least 4.14.1, all FBX files imported into UE4 are 100 times too large when "Convert Scene Unit" is enabled. Unit settings when exporting the mesh has no impact, and neither does editing UnitScaleFactor inside the FBX file.

This is not a big problem with skeletal meshes/animations, where you can simply uncheck the box, but all camera animations imported into Sequencer are scaled up as well with no way to disable it.

This means a camera movement of 9 units (cm) becomes 900 units in Unreal, and I don't see a way to scale Sequencer animations. This behavior is not present in 4.11.

Steps to reproduce:

  1. Download this FBX file of a camera animation exported from After Effects.

  2. Create a new Sequencer animation. Create a camera, and highlight the Transform track for the camera.

  3. Go to General Options -> Import, and load the FBX file.

  4. In 3ds Max, the X axis is at about 9.6 units in frame 1. In Unreal, it's at 960 units.

Product Version: UE 4.14
camera_test.zip (16.7 kB)
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asked Dec 21 '16 at 05:14 AM in Using UE4

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Check your 3ds Max units, as well as the FBX units export options. 3DS Max has a display units and a system units to work with. For ue4, change both of them to cm.

Customize > UnitsSet up. alt text

And then check the System Unit Setup. alt text

Finally, when you export your FBX out, check what units you have set up for it. alt text

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answered Dec 21 '16 at 02:57 PM

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avatar image Loginer Dec 22 '16 at 02:08 AM

Thanks, I was being stupid. By changing the system unit, I was able to import the camera movement and re-export it in centimetres.

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