Michel Anders writes:
I would like to share an older but still useful technique to extend small textures to large uv-mapped objects while avoiding tiling artefacts. This is something that might be useful in situations where you have a good but small scale ground texture that you want to apply to a large field for example.
In this article I explain how this works and what the limitations are. A .blend file with the nodegroup that implements this feature is of course provided as well.