If you want to design clothing for the upper/lower body of your actor, please follow the steps:
Apply the actor's upper/lower body in the Template library.
Go to Modify page, scroll down to the Material & Texture Settings section.
Press the Launch button of the diffuse map setting. It will open the diffuse for the cloth in the image-editing software.
Paint or edit the image in accordance with the body mesh. Remember to save it.
Press the Launch button of the opacity map setting. The opacity texture will be opened in the image-editing software in grayscale format.
Paint the part you want to cut off in black, white for clothing that will be seen or paint in gray to make the cloth semi-transparent. Save the texture image.
"How does opacity work?"
(Black = transparent, Gray = Semi-transparent, White = Opaque)
Save the image in your image editor and then click the Update button in iClone to apply the customized texture to your model.
You can click the Save button to save the texture of the cloth for further use or for packaging the texture map for a Texture Pack.
This feature can only be applied to the G3 and G2 actors.
See CloneCloth tutorial for more details.