How to texture large surface?

Hey ya'll, so this is the first time I'm trying to create a larger scene, and I'm having trouble with the wall textures. I'm trying to make the walls of a sewer look like concrete, and am trying to use a concrete material. When applied it's repeated across the whole thing and looks super bad. I'm sure there is a way better way to do this, I just don't know what it is and can't find an answer anywhere. I'm using probuilder to make my objects if that matters. Thanks to anyone that can assist! Here's a picture of what it looks like how I'm trying to do it now: View attachment 1078713

 

You image didn't work for me.

In general, a simple and effective way for breaking up the look of tiling across a large surface us to use a Detail Map: https://docs.unity3d.com/Manual/StandardShaderMaterialParameterDetail.html

The basic idea is, you can add extra detail onto your texture, to give it a feeling of dirt or imperfections across its surface. If the detail map using a different tiling, it will break up the wall texture.

For example, here's a concrete wall:



The repetition of the texture is jarring. Now I add a Detail map, but with the same tiling as the original concrete:



Looks terrible. But now, change the tiling to 0.1, or 0.2:



Now you pretty much don't see the repetition anymore. That's a pretty aggressive coloring, though, so adjust the detail map's intensity until you get a good blend:



Usually just above the point where you no longer notice the tiling of the base texture.

Anyway, there are other techniques, but this is a pretty easy one to use.