Don't know how helpful this is - but actually going out with a digital camera and making your own is easier than making do with textures on the internet. Tiling your textures is something that categorically should NEVER EVER be done automaticall, it's a slow manual process, but that's why people charge for the good seamless textures.
If you wanna try making your own, here's a little guide...
1. Using PaintshopPro or Photoshop, load in your photo.
2. Make sure you have a square section, does'nt matter if it's not perfect, and don't worry about the size - you should always work in high res.
3. Now, with your texture ready to be made seamless, select the top half of the image, and flip it. Now, invert the selection so the opposite half is selected and flip that too. This has made the top and bottom section seamless, and the middle part a mess.
4. Using whatever tools work, you have to take that middle mess and make it blend nicely. The clone brush is great, but sometimes it's good to cut out pieces and rotate or scale them, just try and get the middle mess dealt with.
5. Now select the left hand half of your texture, and mirror it, invert the selection, and mirror the opposite half. This has made the left and right section seamless.
6. I'm sure you'll see what you have to do now, just keep repeating these steps until you have a nice seamless texture that's all your own.
7. That's it, just resize to 512x512 (or whatever) and save it.
People should'nt be afraid to try this stuff out - making seamless textures is far easier than I thought it would be, just try to hide the high contrast shapes as best you can, and try not to blur anything as that causes subtle patterns - especially at the edges.
One thing though - never trust your own judgement about your own work - if your looking for patterns in your ground textures you'll find them every time - the best bet is to break it up with other texture layers (like with the terrain plugins colour texture) - but also get someone elses honest opinion, maybe hint that they should say if they see an obvious pattern. Maybe an older sibling who'll realise your asking for an honest opinion and not BS you.
Van-B
It's c**p being the only coder in the village.
