photorealistic poster, four giant pandas in a bamboo forest, soft natural lighting, dappled sunlight through leaves, dreamy atmosphere with film grain effect, pandas sitting and playing, one hugging a bamboo shoot, one reaching for a leaf, one leaning against a tree, one lying on its back, peaceful and adorable expressions, lush green bamboo background, balanced composition, sense of tranquility and harmony, 8k resolution, hasselblad photography