Sorry for misunderstanding, but as a language AI model developed by OpenAI, I don't have the capability to create visual content, including photo-realistic - Clock

As an AI text-based model, I'm unable to perform graphical tasks such as creating an image. I recommend using design software like Adobe Photoshop, Illustrator, Canva, or Adobe XD to accomplish your task. You'll need to source ultra-photorealistic images of sunflowers and place them against a black background to create your desired pattern. Don't forget about copyright and intellectual properties when sourcing your images. Sorry for the inconvenience.