This question might be more suitable for the rendering forum.
The easiest way to lift the image might be the exposure control.

This view is from the local renderer, but the online one has something similar.
For the rest it is a matter of placing lights, type of lights, quantity of lights, power of lights, set the sun settings to a different time of day (e.g early morning).
Also the materials used can have an impact (e.g. lighter/darker, shininess).
Rendering is more an art than a science
Louis

Please mention Revit version, especially when uploading Revit files.