Use case: product-mockup. Reference image: small mossy stone landscape and floral framing only. Create a clean vertical 2:3 fresh natural product backdrop with a pale blue sky and soft white cloud bank above, a low uneven dark-gray layered stone ledge in the middle, bright green moss and a few small white wildflowers growing along its upper edge, a rounded dark stone at the far left, and a slim cluster of budding green stems entering from the upper right. Leave the stone ledge open for product placement. Detailed photorealistic nature scene with bright morning light. Change rock strata, moss contours, flowers, bud forms, and cloud shapes so it is related but not identical. No text, numbers, Chinese characters, watermark, logo, edge text, border, or white margin.