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trace()
function of the shading language is fully implemented in 3Delight, with the exception that moving object will not be motion blurred.
3Delight also implements other functions related to ray-tracing, they are listed below and described in more detail in section 4.5 Shading Language.
color trace ( point from; vector dir [; output float dist] )
float trace ( point from; vector dir )
color transmission ( point p1, p2 )
float isshadowray()
float raylevel()
Make sure that visibility attributes are properly set: by default, 3Delight marks objects as being visible to camera only.