This effect was generated in Filter Forge, a Photoshop plugin that allows you to create your own filters.
Create seamless tiles from original images with this filter..
Note:
This version works with square images only.
It does not work well with all images due to the
masking effect. Please feel free to improve upon this idea.
wrap, seamless, tile
This filter has earned its author one of our rewards. They are given to the authors of popular filters and include a free copy of Filter Forge.