- If you have a photo that was taken in less-than-perfect light, try the Image - Adjustments - Shadow/Highlight tool. Some experimentation with this adjustment can yield very good results.
- One principle of Architectural Photography is that of Straight Verticals. If you have an image that has warped verticals due to perspective, you can use the Filter - Distort - Lens Correction tool in Photoshop.
Adjusted Shadow / Highlight and Lens Correction
For more photography and composition principles, check out AB4061 Is That a Photograph? Architectural Photography for 3D Rendering.