Shading > Interactive Shading

Controls the display of objects during interactive modes (such as transformations, camera navigation, and playbacks). At the same time the normal display can be in some sort of shaded mode. For example, the normal display can be smooth-shaded while the interactive display is bounding box.

Interactive shading mode

Select an option from the drop-down list:

Shaded
Wireframe: Displays objects in wireframe mode during the interactive mode.
Bounding Box: Displays objects as bounding boxes during the interactive mode.
Points: Displays objects as points during the interactive mode.
High Quality Rendering: When High Quality Rendering is turned on, this option shades objects using the hardware renderer, but you can set the following options to quicken the refresh while interacting:

Small object culling threshold: Enables occlusion culling, determined by a value you specify for the size of an object (or the unobstructed portion of it), relevant to the screen size (in percentage or pixel values). Any object that falls below this level is not drawn.

Example: If an object occupies 5000 pixels out of a viewport which shows 10000 pixels, then a tolerance of 50% would make the object fall below tolerance and therefore not be drawn.
Disable Shadows: During interaction no shadows are drawn.
Backface Culling: During interaction, all polygon faces that face away from the viewer are not drawn.