Hi Smaker1,

I use Rhino-3D, but might as well use ZBrush or 3dCoat for this.

In Rhino its a convenient two-minute job, even though it isn't a true mesh modeller like the other two.

Here's a screenshot from DAZ Studio, on the left the original OptiTex Doctor Coat, on the right a thickened version (1mm). You can see clearly that the UV's have been retained, inside and out.

You can also split the inner and outer layer, so you can use a different texture for the lining of the garment.

Cheers!

Erik