How to add on some texture, wall-paper, tiles etc

HI,
Somebody know How to add on some textures : wall-paper, tiles, vegetation, iron style, water style, glass style, colors etc, to put put on surfaces. Because default textures are limited.
Thanks

File > Import

Thank you, but where can I find some texture file ? and which extension are they ? .skp ?
The file I found are coming from 3D warehouse, and present .skp extension, but it doesn’t works. I can’t put it in the “texture” window.

I’ve found a solution. I find some photo of texture in Google image and use you’re technic to apply on walls. It’s working.
Thanks Geo

SketchUp Sage Site > Resources > Materials and Textures

What kinds of files can I import into SketchUp? — SketchUp Help

Importing 2D graphics as textures — SketchUp Help