Hi Guys,

Im new to this and am learning Maya however I have an issue with geometry after I use the 'Duplicate Special' command.

For example I create a cube with 2 subdivisions and delete half and then duplicate special which is all fine. The problem comes when I select two faces with the edge loop in the middle of them. When I extrude these faces it creates a new face in the middle of the object where the seam is, when I smooth the mesh it seperates the geometry from the start of the extruded piece to the end.

Please see the two pictures.

Also even after combining the objects and merging the verts this issue still happens.