Hi all,

Very often I use raster images when working with Inkscape. I try to use seamless textures, that were made in 3d. Recently I've found out a new website where one can find different textures of stone, grass, walls, wood, tiles, mosaic. I liked it very much and think you'll enjoy it too. Here is the link:
http://www.assistcg.com/
By the way, for those who are interested in Blender and Gimp there are some useful tuts.