what i have at the moment looks very flat, eg the edges of the penumbra is just as much shaded as the inside, in real life dust particles within it would of travelled through more of the light area thus they would look brighter.
Now it looks way better if i use many lightplanes within the lightvolume, but all those blended polygons kill framerate. does anyone know of any
method of getting a similar looking result with a shader, with only drawing the outside light planes?
also i always have great difficulty in finding the best descriptive english word for something,
whats a better description of these light cast area planes, light aura/lightshafts? at the moment im calling them lightplanes whats the correct term?