Doing Photoshop mockups just for your printer is overkill. Just show him a simple tee template with your design slapped on in the position you want. Also give him measurements; i.e. 4 inches down from the collar, 12 wide design, etc.
For website mockups, Photoshop is the #1 program that is used.
ShirtMockup.com - Upload your art. Mock it up. Download your image for FREE! has shirt back on their paid version of the site.
For website mockups, Photoshop is the #1 program that is used.
ShirtMockup.com - Upload your art. Mock it up. Download your image for FREE! has shirt back on their paid version of the site.