Not sure if this stays topic but maybe this will help some people around.
In AC 9 you could build Alpha textures without any colour. Then use this alphatexture as Bumpmap file and you will have really useful textures that you could change colour with the "Plain color" control in AC9. This only works in Lightworks render.
I have build a startdirectory for sidings and roofs. There is also a transparent map for floor.
http://www.varbergshus.com/slask/bumpmap.zip
Use it for free.
This file will be erased in a near future so if you think it's useful, copy it to another http location!
I will try too write a help for this alpha texture when I got time or make a setupfile for this materials.
/Tobias