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by friedlinguini
Thu May 02, 2013 4:41 pm
Forum: General Development
Topic: emitted importance function
Replies: 4
Views: 3749

Re: emitted importance function

Importance is a necessity for any renderer that traces more than one bounce after tracing a ray from the camera. For example, in a simple path tracer, the "weight" of an eye subpath is accumulated importance divided by the accumulated pdf. At each bounce, the importance is reduced by the B...
by friedlinguini
Wed May 01, 2013 4:38 pm
Forum: General Development
Topic: emitted importance function
Replies: 4
Views: 3749

Re: emitted importance function

Without the We term, W(x,w) would just be zero (since some nonzero portion of light hitting a reflective surface would be absorbed). Importance is basically what portion of reflected or emitted light from a surface contributes to a rendered image. In a path-/ray-tracer We(x,w) should generally only ...

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