Hi Keith,

> Is this because the normals are reversed?

Could be... One thing to try is to make sure you have used Edit/Join to glue together individual surfaces at their common edges before exporting.

If you just have a bunch of totally separate surface objects all built by using Network for example, MoI does not know that they are supposed to be connected together with each other, so there is a possibility of each one getting exported with a different normal direction.

If you join them together, that will make MoI process them in a batch and keep all the orientations for the entire joined set consistent. It also helps ensure that the meshing is created in a consistent way along shared edges so that there are matching vertices there.

- Michael