light intensity extended radius x y z
Extended light works in much the same way as point light, except that the light source itself can be given a size (radius) and (because it has a size) the light will have "fuzzy" edges.
Figure 3-6
/*
extended.ray
Extended Light Example
Stephen Peter 14 Feb 93
*/
eyep 11.25 -6.72 5
lookp 5 2 1.5
screen 300 200
background .9 .9 .9
light 1 extended 2 0 0 8
------- the remainder is the same as area.ray-------
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THE END - Notes on Rayshade - 3 - Lighting and Atmospheric Effects - Extended Light