Released under GNU GPL.

except palmtree3.png by dakal released under CC BY-SA 3.0,
road.jpg and waterfall.png by ctdabomb released under CC BY-SA 3.0,
egypt2.png ("FreeLogographs", 2012, made with Inkscape and Gimp), by Ned J. and Lili Lith, released under CC BY-SA 3.0,
camel model by rudy85 released under CC0,
house models by dakal released under CC BY-SA 3.0,
texture_egypte.jpg by dakal released under CC BY-SA 3.0,
monkey statue, camel_col.jpg, monkey_col.png, sphinx.png by kalado released under GPL,
skybox by ctdabomb relased under CC-BY-SA 3.0 based on images sky3.jpg by Mac released under CC-BY-SA 3.0, and egypt.png relased under GPL.