What are the effective ways to renovate the second-hand house wall?

You can paste wallpaper, there are too many materials, non-woven, paper, silk, smooth and concave.

You can paste stones, there are many cultural stones, and make the wall look like climbing wall.

You can stick glass, there are colored and monochrome, which are different.

Metal plates can be pasted and welded into various shapes.

In fact, besides these, there are many ways to renovate the wall. Only you can't think of it. There is nothing you can't do. You just need to know more about it.