The Navigation window available starting from Pegasus version allows you to improve the graphic quality if your PC is equipped with powerful graphic card.
Close the Navigation window (if open) and open the Application Properties mask by selecting the command FILE->Options, or select the Options button of the Ribbon.
As you see in the next image, try to enable all effects in the navigation, open the advanced section and check the sun light control.
Open again the Navigation window and check the difference.
You should now see more detailed materials and tiles finishes, and the graphic quality of the scene should be better. On the contrary, navigation should be a bit slower (depending on the project complexity and computer power).
By enabling the Sun light control you are now able to open the natural light mask directly in Navigation, clicking the Natural light button in the Navigation group of the Ribbon. Change the Sun position and intensity, and check the result in real time inside the navigation window.
As you can see in the image, Ambient Occlusion effect (together with some tiles finishes) is now available in Navigation too, so that you can have shadows effects where surfaces get in contact.
This article is valid up to version 2018