CVar extShadowQuality

This cvar was replaced by CVar_shadowMode.

This setting controls the Dynamic Shadows in-game.

Current issues with Macs
Currently, shadows don't work fully in OpenGL. Using a d3d -> OpenGL interface will result in incorrect transparency within models. Using a shadow setting higher than "4" may result into a blank screen in raw OpenGL mode.

Default setting

 * 0

Possible settings

 * 0 :Off. This leaves the 'blob' type shadow only.  If off, shadowLOD is activated.
 * 1 :On for characters (Players, NPCs, mounts, etc) only.
 * 2 :On for Environment & characters, low-res, med-distance.
 * 3 :On for Environment & characters, low-res, large distance.
 * 4 :On for Environment & characters, high-res, large distance.
 * 5 :On for everything, shadows overlap, high-res, large distance.

Changing this setting
In-game, type the following /console extShadowQuality setting

Alternatively, you can exit wow, open the Config.wtf file, and add the following line: SET extShadowQuality setting

Or you can change the setting via the in-game Video Options.