Now all the series are available from http://photocomix2.deviantart.com/gallery/

Some very interesting patterns there PC.
I was wondering why I hadn't seen them on dA before.

I love the bright stained glass look to all of these!

I agree. I especially like the next to the last Squared Trippy one.

a 600x600 colorful and semitransparent series
http://www.flickr.com/photos/photocomix_mandala/sets/72157628717451681/

Download of the original size (the only that preserve transparency) it is a bit cumbersome from flickr i may zip and post on deviantart too (i didn't yet because upload to deviantart for me is a pain , batch are no possible setting not preserved...took really too long time i should find a sollution

The trick was simple when i saw too large area of a solid colors, i i seletcted the color

i

Quiz !
All patterns created in one program (not free - but you can use for 1 month) in 10 minutes.
Link to the program is on page Gimpchat.
Who can guess - what is called the program? (for simplicity - Lylejk is excluded from the fun as the author of the link ..)

Not sure what program you are referring too MareroQ so I couldn't answer anyway. lol

Anyway, just sharing this simple pattern based on lessons learned about circle packing. If you have a circular object, just increase the canvas size in the y-axis direction only by 169% to 171% (eyeballed range from the few items that I've tested) center the object to the new canvas. Then, you dup and offset the base layer by [x/50, y/50] and merge the object. You pattern will be both seamless and packed.

Nice site and well organized: http://www.texturemate.com/

And, although it's in Dutch, you can look here what others have found more: http://www.dutchgimpers.nl/forum/index.php --> look under 'Resources'.

I've ran across texturemate, but never did download/use it so didn't remember that one. All kinds of ways to create seamless textures, but cheap I am. lol