Keep the model context, then adjust subject, style, lighting, camera angle, and output ratio before remixing.
Replace vague nouns with concrete subjects, locations, colors, materials, and mood words.
Run one strong version first, then iterate only the parts you want to change.
Prompt
Place Monkey D. Luffy next to the man, smiling widely with his straw hat tilted. Use a Thousand Sunny deck background with bright blue sky. Keep the selfie composition intact and integrate both characters naturally.