the background is showing the concept that there have a building build at the mountain, and it also with a powerful magic protect. in this concept art the world is a fantasy world, all is about magic. i want to make the concept art look happening, so in this background showing the story about they have enemy using magic meteor power to destroy/ attack the city. the magic meteor break through the magic shield and hit into the city. because of the magic meteor it make some part are burning. so that can the explosion is just have liquid, without smoke.