Hey!
I’ve imported a house object that I found online for free, and now I’m trying to color it. I have a wall image, which I applied to a material, and then applied the said material to the wall. I’ve tried increasing/decreasing the tiling, but as you can see, one wall is still very messed up, and I’m not sure what else am I supposed to 
How the texture is applied to a model is based on it’s UV mapping. Hypothetically, If the author of this model was planning to color the model with simple vertex colors or a procedural material, than that person may not have bothered to create a useful uv mapping.
If you want to change the UV mapping, it’s better to use a 3D modelling package like Blender.
