With SketchUp's Shadows feature, you can make your model cast a basic shadow or see how the sun casts shadows on or around a geolocated model.When you're casting real-world shadows, SketchUp's calculations are based on the following:

SketchUp Styles can add complexity to a model that slow down SketchUp as you work on your 3D model. To apply the styles you need while optimizing performance, use Fast Style. When a style qualifies as a Fast Style, SketchUp displays a badge like this: If you apply a style created in SketchUp 2014 or earlier, the Fast Style doesn't display the badge until you force the style to update once in SketchUp.

SketchUp provides a lot of styles to choose from by default. If those don’t quite fit the needs of your design, you can always edit them, or even create a new one. To get started, open the Styles panel and follow these steps:To create a new style click Create New Style () on the Select tab. If you want to edit an existing style, move on to step 2.