Legacy High Quality Viewport options

Select Renderer > Legacy High Quality Viewport > to open the Hardware Renderer Display Options window to set these options.

Display Quality

Low Quality Lighting

Low quality lighting is essentially per-vertex lighting, which calculates light only on vertices, then blends the results. Renders are faster and of reasonably good quality.

Match Viewport Lights

When turned on, only as many lights as are supported by the graphics card (typically 8 lights) are used.

Transparent Shadow Maps

Those regions of an object which are fully transparent will not cast a shadow. For example if you map the transparency channel of a shader (on an object) to a checker texture the fully transparent portions of the object would not cast a shadow.

Display Parameters

Occlusion Culling

This option improves performance for scenes with many objects, where one or more objects can be obscured from the viewpoint of the active camera. When turned on, this option increases performance by preventing out-of-view objects from being drawn.

Culling Override

Every position on a surface has a normal which points in the direction that is considered (for culling purposes) to be the "front side" of the surface.