Fixing up-axis disparity between Blender and Unity

Unity Engine
1

Hi guys,

I use Blender as my modeller and it uses Z up-axis and Unity uses Y up.

Now when I export my FBX or even DAE file from Blender and load it into Unity everything appears fine at first glance, the mesh is right way up, animations work, etc. but my object is rotated 270 degrees in X.

Is there a way to transpose an incoming mesh so that it is correctly oriented, ie. Rotation is 0,0,0 and the mesh is oriented correctly?

The alternative is to transpose the mesh and all objects in Blender’s FBX exporter, which is a pretty daunting task to say the least.

Thanks for any help.

2

You can use the Asset Post-Processor, and rotate the mesh’s data. I typically do one of two things, however. If it is important which way the mesh’s axes point, I just keep the parent that the .blend comes in as, and use those axes for game logic. Otherwise, I just remove the parent and have a stupid rotation on the object, but it doesn’t matter aside from being numerical clutter in the Editor.

3

Thanks Jessy, I’ll have a look at this.