Add a 3D Picture to the Skin
To add a 3D picture to the skin:
On the last page of the Create skin model, click 
Add 3D picture.
Select a file and click Open.
Drag the 3D picture brightness slider to the left or the right until the desired brightness for the picture is reached.
To remove the 3D picture from the skin, click 
Remove 3D picture.
To hide the 3D picture, right-click the skin model in the 3D viewer and select 3D picture.