I've had 20+ years' Photoshop experience and am an expert at photo manipulation, simulating realism and tricking the eye. Below are a few pieces I've done over the years.
Incorporated fast lines simulating speed and dynamic city, matching the style on another photograph. Before and after.
Mockups of signage in situ at large event.
Photoshop aging treatment.
Client requested artists impression of a large conservatory at the rear of hotel. Before and after.
Client requested artists impression of nursery layout, created in 3D then shaded in Photoshop.