Search Issue Tracker

By Design

Votes

0

Found in

2018.4

2019.4

2020.3

2021.1

2021.2

2021.2.0a17

Issue ID

1336122

Regression

No

FBX model's GameObjects are not aligned along coordinate axes when model is imported from DAZ3D

Asset - Importers

-

Reproduction steps:
1. Open the attached "case_1336122.zip" project
2. Load the "SampleScene"
3. In the Hierarchy find and select the "lindex1" GameObject
4. Select the Rotation tool and rotate the GameObject along the z-axis

Expected result: the object is properly aligned along the x-axis
Actual result: the object is not aligned along the x-axis (see "eAevhBlMTs.mp4" video)

Reproducible with: 2018.4.35f1, 2019.4.28f1, 2020.3.11f1, 2021.1.10f1, 2021.2.0a19

  1. Resolution Note (2021.2.X):

    The issue is that FBX uses a complex transform system with pre-rotations, post-rotations, pivots and others, whereas Unity uses a much simpler system that expresses transformation with a single matrix. This means that during import, Unity converts those complex transforms into Unity transforms via the FBX SDK. The result of that conversion is that the models and animations look identical but the transform values differ. Other DCCs show the correct orientation because they support the same ( or similar ) complex transform system and do not need to perform a conversion.
    As long as your model and animations look identical, I think this is actually the expected behavior.
    Unfortunately, I don't think that is something we can address.

Add comment

Log in to post comment