He wants to create an outline for his models.
Unfortunaltely, uniformly scaling a mesh's "outline mesh" (using ScaleMesh) causes problems for anything other than simple geometric shapes such as cubes and spheres. What he needs to do is extrude each vertex of his duplicated, flipped mesh outwards by a set amount (which can be varied to alter the thickness of the lines.) He'll have to write a custom routine to do this or use modelling software.
Unfortunaltely, uniformly scaling a mesh's "outline mesh" (using ScaleMesh) causes problems for anything other than simple geometric shapes such as cubes and spheres. What he needs to do is extrude each vertex of his duplicated, flipped mesh outwards by a set amount (which can be varied to alter the thickness of the lines.) He'll have to write a custom routine to do this or use modelling software.