Did the clouds layer, it was relatively simple after I banged my head too much to a wall and decided to write small custom shader for it. Hardest part was to fix the parameters right... have to check someday about the textures if they could be made better.
There is only couple more tests to be done which are ofcourse the hardest, first being a simple building construction and the other is getting control of people. Have to rig and animate the first human model (simple walk and stand idle shall be enough).
With all these proof-of-concepts, I take a screencapture video and start inviting people to the project.