I created a mesh from a plane primitive and cannot remove the hard edges on its border (shown in purple) This is causing issues when I try to extrude and use smooth preview. When I bring the model into blender and clear hard edges I can extrude and apply a subsurf with no issue. However, bringing that same model back into…
Sooo much better. I think you can even replace the normal you're using along the second border. It'll enhance the pattern along the outer border, which looks cooler. I suggest rectangles.
sounds like some of your uvs are to close to the uv space border... mubox needs space to bleed... sometimes it moves uv shells into the next uv space in higher levels if they are to close to the border... try to scale the uvs down..