There are two ways to use Google Gemini to create realistic photos: by using only a prompt and pairing uploaded image/s with your prompt. If, however, you want Gemini to use your own pictures in some parts of the generated image, you have to upload the file first. When working with an existing image, the prompt formula will differ slightly as Gemini can do so much more with it. For instance, you can upload two pictures — like separate selfies of you and your dad — and ask Gemini to combine them into a single photo of you together. Whichever approach you prefer, it's important to keep your prompts as detailed as possible to make Google Gemini's AI response more precise.