MIXAMO Characters have different orientation matrixes

Dear all,

I have downloaded various characters (in DAE format), and uploaded them in Xcode Scene Editor.

There I noticed that the same nodes (e.g. mixamorig_Spine.Spine1.Spine2.RightShoulder.RightArm) have different orientation matrices.

I checked the source code of the DAE files and indeed that is the case.

Hereafter the matrix of the mixamorig_Spine.Spine1.Spine2.RightShoulder.RightArm from different models:

"remy"

<matrix>

0.1834024  -0.9826105    0.02854819 -26.33229

0.9736248  0.185579        0.1326078        0.6125793

-0.1356041 0.003474758 0.9907227 -5.423017

0                  0                    0                  1

</matrix>

"Ch03"

<matrix>
0.9999421         0.001320216     0.001632611    0

0.0008238596   0.4684616        -0.8834209        7.189678

-0.001931228    0.8834205        0.4684594         0

0                         0                       0                        1

</matrix>

This makes automatic replacement of models practically impossible and it is a shame since in my app I have movements defined as specific rotations of specific nodes in specific directions, and that of course can only work if the orientation matrices use the same orientation.

Can please anyone advice on how to proceed so that all models are aligned in the same way as for "remy" ?

Looking forward your advice.