Zombie Stew: I often enjoy tinkering with software that generates seamless textures. I have a license for Filter Forge
Consider also investing in TextureMaker once the developer comes out of hiding
It has a an "extract" texture from any image feature. Self referential as with some procedural textures: pull texture from an area of the source to apply to the image as a whole with some of the article's techniques.
There are [now] dozens of great F/OSS procedural (seamless) texture creation tools
** Not covered in this article are layer blend modes
I am nearly infuriated that adobe resists adding a feature to allow user created layer blend modes. This custom mode should be stored in the photoshop format file so others need not have locally installed your custom layer blend mode. ALSO the plugin SDK needs to be expanded to allow this.
custom layer blend modes are possible in gimp with G'Mic ... but aren't re editable as you might like
is the texturemaker guy in a coma? God forbid
for those of us lacking occasion to incinerate monies please rehash the article for GIMP 2.8+ with G'Mic.
I would like to see a field test article using that infinitec ium of prior commenter. as a direct purchase from manufacturer I'd like to actually know whatbpower I'd be getting or hassle.