Use the lasso in the polygon mode to select the areas of the shirt you want to put the pattern. Do not just put the pattern on the "shirt", he pattern should be put on each section of the shirt separately, rotating each pattern to show how the pattern would flow. Use layers to define each section.Make a duplicate layer, before you try doing anything with the original. OK to screw up a duplicate layer, Fatal to screw up an original.Set your Lasso to to polygonalright click on the lasso.move the cursor to poly then releasenow go to the layer marked background copy, right click on the layer boxGo to the image and select the area you want to delete and encircle it wit the lasso, on click at each point, til the lasso lights up.go to the tool-box select Edit---Copy to a new layer. A new layer is automatically made when you copy anything. Use the clone stamp 15th down on the left side tools and fill in the background. Click on the Box on the horizontal tool box marked size. This will make the cloning area larger or smaller.Try this and let me know how it works through the add to your question.