Render Settings for Revit

Great render settings to use a starting point - see below.

Render Settings - good quality but much faster to render

Image Precision = 4
Reflections = 2
Refractions = 4
Blurred Reflections = 1
Blurred Refractions = 1
Soft Shadows = OFF
Indirect Illumination = 1
Indirect Smoothness = 1
Indirect Bounces =4
Daylight Portals = OFF

Soft Shadows
Custom
Lighting = 2am
Sky = No Clouds
Exposure = 2-2.5

Clay Render
Custom
New Phase Filter
Materials = Clay
Lighting = 2am
Sky = No Clouds
Background Style = Colour - White
Exposure = 2-2.5

Exposure Settings - realistic and impressive
Custom
Exposure Value = 12.5
Highlights = 0.06
Mid Tones = 0.5
Shadows = 0.2
White Point = 7500
Saturation = 1.1 - Variable

via
BIM Day Out // Tom de Plater

EDIT
More detailed info at:
Revit Rendering - Revit Tutorials Online