I have more than 40 000 textures in 25gig that I found on the internet
and some by exchange.
The thing is none of them can be used directly (even the one made for
professional).
They all need to be adjusted.
The best way from my experience is go outside take some pictures of the
materials you need,
Edit them with Gimp add more layers of dirt, rust with holes in the image.
Tileable does not exist or are very rare.
What you can do create a texture to mix materials with the pattern.
So, not only procedural texture are not good, 99% of the textures found
on CD for 30$ will not do it for any project.
Each texture must be done for the object that will receive it. There is
no shortcut.
If you texture an object that exist, take a picture on every side and
map it accordingly.
For on of my project I took picture of a piece of wood from every side
and mapped it with a different texture on every surface of the object.
The result was so amazing, look in my gallery for the wood cube and
planks. This is the secret of texturing.
You need rusty metal, take your camera and go texture hunting.
Recently I was browsing my texture collection, as I do many times, none
of them would fit?
To do your textures you need : Gimp for image editing and Inkscape to
create your pattern or stamps
Jean-Sebastien Perron
www.Neuroworld.ws