Years ago, I discovered an interesting plugin to use with PaintShop Pro, even though it is advertised as a Photoshop plugin. as you know, most plugins in the .8bf format will work with PSP. Although Paintshop had the ability to create seamless patterns, any tile generated would still show a definite repeat that might not be wanted by the user. The plugin Splatter was a fantastic option to create a full-page design without the need for a seamless plugin applied on a smaller tile.
