OS4 burned on planet surface

So, that's an older wallpaper I've made inspiring by ideas from childchood ;). It is just a very freely realisation of mix of the scenes I remember from one episode of "classic" comic series based on Erich von Daniken theories ["War for the Planet" -translating from Polish] - a spherical insectoid spaceship burns "os4" mark on the desert surface :) [I know, I know - insectoids were the bad (?) guys ;)]