Hi Chris, where does the .obj file you are importing originate from?

For the next v5 beta there will be some new options for rotating the SubD import from Y-Up to Z-Up which may help:



In the meantime the easiest way to re-orient the object inside MoI is to use the Transform > Orient > View to View command:
https://moi3d.com/4.0/docs/moi_command_reference8.htm#orientviewtoview

To do that, after you have done the import the imported objects should be selected. Run Transform > Orient > View/View, and at the first prompt where it says "Click in source view" in the prompt in the upper right corner of the window, click in the Front view. At the next prompt where it says "Click in target view", click in the Top view. That should reorient your objects.

- Michael