Progress

Quick update of the status: Done some procedural generation experiments, looks very promising indeed.  Algorithms still need some adjustment, now the generated cave system tend to be too closed and requires some manual tuning. I currently have a separate generation tool that exports the generated world as ppm file that then can be viewed/edited in some Paint program. I am using Gimp for that.

Also implemented Diurnal variation with stars on the sky at night. 

Some demo videos coming before the christmas.