The orientation of the balloon is incorrect

[cx20]

I tried to display the bear's model that was in sketchfab in RedGL.js.
https://sketchfab.com/models/f2f13a8630004b1c82730d8b9ffa0e1f

However, Bear's model is not displayed in the correct orientation.

RedGL + Bear On Balloons model result:
http://jsdo.it/cx20/8ZrJ

three.js + Bear On Baloons model result:
http://jsdo.it/cx20/6MMO

[redcamel]

@cx20
this is Quaternion normalize problem when interpolation of rotation animation.
I fixed it. will update soon.

[redcamel]

@cx20 resolved this issue!
test at this link.

[cx20]

I confirmed that the balloon is correctly displayed by the latest version of RedGL.

RedGL + Bear On Balloons model result: