Mech walking on a purple surface planet stars planets foggy atmosferic rainny  sci-fi humans fighting against retro robots futuristic rainy big battle surface spaceships in the air firing laser weapons wide full hd digital painting, artstation, concept art, soft light, hdri, smooth, sharp focus, illustration, fantasy, intricate, elegant, highly detailed, D&D, matte painting, in the style of Greg Rutkowski and Alphonse Mucha and artemisia, 8k, highly detailed, jurgens, rutkowski, bouguereau, pastoral, rustic, georgic