* To be honest, I've spent so much time reading about niobates and their structural properties that these octahedra with an atom placed in the center burned themselves into my mind. They have a tetragonal crystal structure, which is why I call this "Tetraworld" instead of "Octaworld" or "Planet inside a strange thingy".

Something new from me! This time, I actually tried to stick to a more natural color scheme (emphasis on the "tried"-part). Made for's Space Art Contest: Unique Planets in the Space-category!Woah, a DD! Thank you so much,! Cue the lawoo-spam!!The hyperbasic idea behind it: some sort of higher civilization figured that they can settle planets beyond the habitable zone if they build a structure around their entire world, thus abusing the greenhouse effect and creating a more pleasant climate! Why do they use an octahedral structure, though? Well, that's something you'll have to ask them!Personally, I'm quite happy with the outcome. If you are, too, please let me know!Enjoy----