F1 or H              : This Help / next page
F2                   : Credits.
F3                   : Change autoplay time.
Mouse                : Look.
Right Mouse Button   : Zoom.
Arrows and PgUp/PgDn : Fly.
Shift                : Run.
I                    : Informations On/Off.
W                    : Wireframe On/Off.
K                    : Toggle logos.
Y                    : Toggle 2d/3d logos.
Q                    : Stop movement of 3d logos.
PrintScreen          : Take Screenshot.
D                    : Default Settings for the entire scene.
J                    : Cycle the color of the big light.
U                    : Change the swirl behaviour.
+ and -              : Increase/Decrease Cave L.O.D.
Ins and Del          : Increase/Decrease Water L.O.D.
0 to 7               : The Cave L.O.D.
Alt + 0 to 7         : The reflected cave L.O.D.
TAB                  : Change reflected cave L.O.D. to cave L.O.D.
F                    : Freeze.
L                    : Change lights behaviour.
E                    : Assign random colors to lights.
R                    : Starts/Stop recording.
Numpad 0             : Insert keyframe.
C                    : Camera Autofly On/Off.
S                    : Smooth Water Normals On/Off.
Alt+S                : Smooth cave normals On/Off 
T                    : Water drops On/Off.
Home/End             : Increase/Decrease Water transparency.
X                    : Organical Aspect.                    
N/M                  : Play with grafitty.
O                    : Toggle 1/6 cube faces rendering/frame.
Z/Alt +Z             : Increase/decrease water density.
V/Alt +V             : Increase/decrease drops radius.
B/Alt +B             : Increase/decrease drops depth.
F4/F5/F6 /+Alt       : Increase/decrease red/green/blue 
                       component of  cave ambient color
F7/F8/F9 /+Alt       : Increase/decrease red/green/blue 
                       component of water ambient color
F10/F11/F12 /+Alt    : Increase/decrease red/green/blue 
                       component of the big light color
Esc                  : Exit the Demo.