How to Create Your Own Watermark in Photoshop
1. Use Pen Tool to Draw a Shape
2. Rasterize Layer
3. Selection Tool to Delete Center Area
4. Put Text or Your Logo in the Middle
5. Delete Background
6. Merge All Layer (Ctrl+E)
7. Change Opacity to 50%
8. Edit - Define Pattern
9. Go to The Target Image, Edit - Fill (Shift + F5)