I used these sources for the non-original art used in this mod:

Light stone paving
http://www.aoaforums.com/forum/digital-image-photo-video-audio-editing/48795-camoflage-seamless-texture-maps-free-use-4.html

Hexagonal paving
http://www.burningwell.org/gallery2/v/textures/tiling/hexagon+paving+stones+tileable+full.jpg.html