Changes for version 4:
- removed light beams from coridor
- removed flickering light near engine room
- replaced planet textures with hd versions
- replaced rocks textures with new hd versions
- replaced default radio model with custom model
- replaced reflective floor with black carpet and tile floor in bridge
- added more lightning in bridge
- extended wormhole tunnel
- blocked some places where player could hide and die from acid
- small changes in texture coordinations
- two lockers with melee weapons are now open(others too but players must open them)
- deleted some unused assets
- cubemaps has been rebuild
- some small minor changes