Load the wall prop. Go into advanced material room. In the wall01 material, load my BBstone01 UV material file that you got in the zip I gave you.

Look at my picture. See the red arrow - change PM:Tile Aspect Ratio to 1 like I did here.

Now look at your wall. (If you don't have advanced preview you may have to render to see this.)

Observe two things:

1. Look on the top half. The tiles are not square. This means the U scale and V scale in the UV mapping on the wall are not equal.

2. Look on the bottom half which is a gradient in U. Notice that it repeats black to white, then black to white, then black to white. The wall is not one piece - it's actually three different cards. There is even a little bit of gap between them.

The tile node doesn't work perfectly with uneven scales like this. And since the three-cards are not perfectly UV mapped 0 to 1 and not quite touching either, the tiles we make will appear to be a little messed up at the joints.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)