Textures used are coming from (Royalty Free):
http://www.katsbits.com/download/textures/
http://planetpixelemporium.com/earth.html

Library's used:
SDL 1.2
FreeImage.

Special Thanks to:
Jacco Bikker - For raytracing course.
International Game Architecture & Design (IGAD) study at the NHTV Breda ( Holland ) - My school