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Part III. Illumination Chapter 13. Lies and Impostors http://www.arcsynthesis.org/gltut/Illumination/Tutorial%2013.html
W,A,S,D - move the cameras forward/backwards and left/right, relative to the camera's current orientation. Holding SHIFT with these keys will move in smaller increments. Q,E - raise and lower the camera, relative to its current orientation. Holding SHIFT with these keys will move in smaller increments. P - toggle pausing on/off. -,= - rewind/jump forward time by 0.5 second (of real-time). T - toggle viewing the look-at point. G - toggle the drawing of the light source.
LEFT CLICKING and DRAGGING - rotate the camera around the target point, both horizontally and vertically. LEFT CLICKING and DRAGGING + CTRL - rotate the camera around the target point, either horizontally or vertically. LEFT CLICKING and DRAGGING + ALT - change the camera's up direction. WHEEL SCROLLING - move the camera closer to it's target point or farther away.
@author integeruser