Hi gustavo, there is not currently a way to visually see which side MoI is considering the "outside" direction of a surface object that is not a closed solid. Some kind of display for that is something that I want to add in the future. It hasn't been done yet because the modeling operations in MoI are pretty much set up to avoid being sensitive to that.

If you do know you have an object that needs flipping, there is a Flip command in MoI that you can set up on a shortcut key to flip the particular object.


Do you only render with single-sided materials? Does the blackness go away if you use double-sided lighting in the material?


One thing that's a bit odd is getting a splotchy result - is it possible that there are 2 objects stacked up right on top of each other in those situations?


Another thing to be careful of is that you can get the vertex maps out of sync with the geometry if you do some things in Modo like if you transform the object while not in "item" mode. That can do stuff like transform all the vertices of the object but it won't update the vertex normal map when not in item mode so the normals are out of sync with the object when that happens.

Is it possible that some of the problem objects were transformed in Modo while not in item mode?

- Michael