Outdoor Shots of your Model
Not much beats natural sunlight (when available and relevant to your model's setting) for illuminating all the details of a LEGO architectural model like those examples below.
When a skyline or natural vista is needed behind your model to give it depth or a background, using a blurred or undefined field of sight can help set your model into a "realized" setting.
Natural light is wonderful for lightening up shadows or highlighting relief details in your model. If using reflectors or enhanced lighting, like spotlights, you can adjust right where you need your highlighting to land. -BR