There is a man sitting under a tree in the grass

"Generate an ultra-realistic image of a man with a serene and gentle smile on his face, sitting under a majestic tree in the midst of a stunning garden filled with a riot of field flowers. He should be looking forward with his gaze. In the background, there should be a serene waterfall cascading into a tranquil lake. The dappled sunlight filters through the leaves overhead, casting a warm and inviting glow. Capture the essence of serenity and natural beauty in this scene, ensuring every detail is faithfully rendered to achieve a level of realism that makes the viewer feel as though they could step into the image."