Added a cvar that will enable shadow cascade optimization whereby you can reject octree nodes that dont intersect with camera frustum (#429)

Signed-off-by: moudgils <[email protected]>

Registry/multiplayersample.setreg

@@ -19,10 +19,15 @@
 					"ImageSystemDescriptor": {
 						"SystemStreamingImagePoolSize": 0,
 						"SystemAttachmentImagePoolSize": 0,
-                        "SystemStreamingImagePoolMipBias": 1
+						"SystemStreamingImagePoolMipBias": 1
 					}
 				}
 			}
+		},
+		"Autoexec": {
+			"ConsoleCommands": {
+				"r_shadowCascadeExtrusionAmount": 20
+			}
 		}
 	}
 }