Please Help! What's wrong with ingame-walls?

Okay, I've uploadet to SFS. SFS

Don't be surprised at the picture sizes, these are double walls as the tiles are each arranged differently to reduce the repeat. So that's definitely not the reason. I had first created the walls as singles and had the same problem. Habs changed so as not to inflate the set so. The walls are still available as full, as 2m and as 1.5m high tiled and as I said in two versions with 2 different ends, once 3/4 wall width and once 1/2 wall width. A smooth version of everything is to be added possibly still and suitable floors. It quickly becomes confusing in the game. x_x But don't worry, in zip are only 3 walls for testing. :D

I had the same idea a few minutes ago and shrunk the walls and it does nothing. It's the same fault.
That I have done all the walls before individually in the normal aspect ratio and I have the same fault, I wrote already. have that even with another tile backsplash I had done once. There the tiles are staggered and I have thereby the seam exactly in every second tile in the height. And also these are just normal simple walls. The fact that it works seamlessly with the double walls, shows the pure wall and the fully tiled. That can't be the problem.

Wall Murals (nothing else are my double walls) also work in the game. The problem is, I "cut" the tiles at one end of the wall, whether single or double wall (mural), whether adjusted in height or not (which, by the way, is not a must, it works without and is quite recommended if you do not want that the textures muddy), it slips, but just only at the height of the tiles, everything that is above, looks nice and is seamless. Ergo, I assume that the textures in the game are not transferred exactly on the walls. Normally you use walls where the pattern goes over the full width, there the problem doesn't exist or you don't see it, because it goes seamlessly into the other wall.
Any attempt at a solution has nothing to do with my problem.

Let's start over. I'm not talking about the seam problem right now.

What is written in the tutorial?

"Walls which are not resized correctly will show up with question mark images in place of your new images for some players."

Your texture can be 512x1024, 1024x1024, 1024x2048, 1024x4096 and so on. The ratio is always a multiple of 2. The size cannot be 768 or 1280. Read this post to understand the reason.

Yes nhayaa, for me also the 256x1280 solution works without problems too and in the first place I work for ME.
godexyposa Who says that I can not make another "weakened version" for the users? And they can then decide for themselves which variant they prefer.
I'm tinkering since 2007! for the Sims, albeit under a different creatorname. I know a bit about texturising. This discussion about it is therefore completely off topic for me and no help to me, sorry.