There may be times when you need to adjust the sun and shadows in your model. With the introduction of the sun path tool in Revit Architecture, this is a lot easier. Bruce Madsen from HOK S.F explains.
In the 3D view of interest, click on the sun icon in the lower-left of the drawing space.
When the dialog box opens, select the top option. This will show the sun as a yellow ball in the view.
Revit displays the sun and sun path.
Modify the date and time as needed to adjust the sun – just click on the text and change the numbers.
After changing the text, Revit changes the sun angle and you can verify if it gives a better contrast.