"I'd like an image of a dense forest scene embodying the Pacific Northwest's unique environment. The focus should be on tall, ancient trees like Douglas firs and Western red cedars, with lush undergrowth including ferns and mosses. The canopy should be thick, allowing only dappled sunlight to penetrate. Include subtle elevation changes to showcase the region's hilly terrain, and ensure the trees' textures are detailed to highlight their rugged, mossy bark. The image should be designed with a grayscale gradient suitable for height mapping, where darker shades represent lower elevations and lighter shades indicate higher elevations, ensuring the final 3D print will have a realistic, tactile representation of a Pacific Northwest forest."