In the model Edit mode, an additional viewer settings widget is available on the left of the viewer window. This widget contains a set of settings controlling the appearance and interactivity of the 3d scene. We break down those settings below.
Enable/disable shadows in the scene. Shadows make the scene more realistic but they can hurt the performance on low-end devices.
Enable/disable ambient occlusion from the scene. Ambient occlusion is a rendering technique which modulates the amount of ambient light received by areas of the scene, depending on how exposed they are. This setting can significantly improve the realism of the scene but also hurt performance on low-end devices.
Default material color
Define the color used for any geometry that wasn't assigned a material in Grasshopper. This will typically be the color displayed if the definition includes Geometry, Mesh, Brep components or any component outputting geometry that have the Preview in Grasshopper turned on.
Enable/disable displaying a plane at the ground level of the scene (z=0).
Enable/disable displaying a grid on the ground plane at the ground level of the scene (z=0).
Define the color used for the background of the viewer window (default is white). The alpha channel allows to define transparent background colors. The background color isn't used when an environment map is visible.
Enable/disable displaying the environment map in the scene. An environment is always used in the scene for reflections, but by default it is invisible.