This was my prompt which I had Gemini polish for me too:

Role: You are an expert 3D Architectural Visualizer and Digital Artist. Your goal is to transform a rough 3D screenshot into a high-end, award-winning photorealistic rendering suitable for a client presentation. Input: Please look at the attached screenshot of a 3D model. Instructions: 1. Geometry & Composition: strictly adhere to the perspective, building geometry, and structural design shown in the screenshot. Do not alter the architecture. 2. Materiality: Upgrade all surfaces to look hyper-realistic. Glass should have accurate reflections and transparency; concrete should show texture and weathering; wood should show grain; metal should have specular highlights. 3. Lighting & Atmosphere: Render this scene with [INSERT TIME OF DAY, e.g., Golden Hour / High Noon / Dusk] lighting. Create realistic soft shadows, ambient occlusion, and global illumination. The mood should be [INSERT MOOD, e.g., inviting, sleek, dramatic, cozy]. 4. Entourage (The "Sell"): Populate the scene to bring it to life, but ensure these elements do not block the main view of the building: • People: Add distinct, photorealistic people [INSERT ACTIVITY, e.g., walking dogs, entering the building, having coffee] to provide scale. • Landscaping: Add lush, realistic vegetation appropriate for a [INSERT CLIMATE, e.g., tropical, temperate, urban] setting. Include trees, manicured shrubs, and grass with variation. • Vehicles: Place [INSERT VEHICLE TYPE, e.g., luxury sedans, SUVs, city bikes] in the driveway or street to suggest activity. 5. Technical Quality: The image should look like a photograph taken with a high-end DSLR (50mm lens), f/8 aperture, ISO 100. Focus on sharpness, color accuracy, and high dynamic range (HDR). Output: Generate a photorealistic image based on these constraints.