ah well, if you didn't assign the material ^^ Your texture file lies on a "bitmap" node, which has several parameters to control tiling, filtering, uv channel...This is where you get if you click on the diffuse texture (planktextur) in your material editor. It encapsulates your texture file and has a default name at its…
I think I figured it out - I forgot to actually go into the "Plankor1" material and enable "Show shaded material in viewport" and "Assign material to selection". As you can see, I now have "Plankor1" material assigned to and showed in viewport in the slot for ID 23. This assigns it to ID 23 in the Unwrap UVW modifier, and…