The document provides a detailed 11-step guide for converting daytime photos to nighttime photos in Photoshop. Some of the key steps include selecting and darkening the sky, adding stars to the night sky, illuminating windows, and adding new light sources. Additional techniques covered are creating an early dawn or late dusk effect, manipulating clouds, and enhancing the overall brightness. Professional photo editing services can help real estate agents and designers present proposed plans and designs using day-to-night converted images.