Now there's the part which I like the most - texture painting. Using many various layers, brushes and additional images I create my wall-texture. When I finish painting I save my work as a simple JPG file. And my texture is almost done. "Almost" because I need to create "dirt masks", "bump and glossiness masks" by modifying original texture.
Remember that every texture has its own history and destiny. Do not waste good texture by adding too many dirt masks, scratches or colours. More: I never use new layers in full saturated colors. It's better to paint too dark texture than too bright!
Then I just put my new texture onto my wall-object using simple "Plane UVW mapping cordinates". Here is the final effect.
Using the same simple and quick technique I create textures on ground. The ground is modelled by several box objects. That's why I need to crop final big texture onto several smaller and save them as separate JPG files.
How professional textures can be helpful
Before I take you to the next step of texturing, I'll write some words about using image textures. Every part of CG work is important: modelling, animating, light/camera placement, texture/maps making or scripting. All that consists on your work precision and experience. Without good drawing techniques you won't create a good looking texture. But not only standard techniques are important. Good reference materials sometimes can save your life or time. I can't even imagine how hard would it be for me to create good looking texture without reference-images. 3DTotal gives you an unbelievable collection of textures and reference-images. When I start working over the story and storyboard - together I colect texture images: spending hours wandering with my digital camera, trying to find e.g. a really good sample of rusted metal.