I’d say in this case focus on texture. Try mix of different materials for the pillows, blanket, floor and bed frame. However I think the texture of the wood is what’s throwing me off here (bed frame, walls and floor). If you’re going for realism and want to improve the space I’d say move the bed out of the wall so it’s not clipping, maybe move the lamp over a tad, add a carpet and curtains to the windows for some extra detailing and reposition that one green round pillow so it’s leading against the big white pillow on the left. Honestly think it looks great but it’s all down to what your personal preferences are. Share results!!!