"Create a thumbnail for a YouTube video on mental health, emphasizing clarity and the concept of healing. The image should feature a photorealistic scene of a peaceful outdoor setting, such as a serene lake with a reflection of the sky at dawn, symbolizing tranquility and renewal. The scene should evoke a sense of calmness and healing, inviting viewers to reflect on their mental well-being. Ensure the image is optimized for YouTube thumbnails, focusing on high visibility and realistic details that closely mimic a high-quality photograph, chaos, 4k --ar 16:9 --niji 6