<http://webisa.webdatacommons.org/61967196>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/61967196>	<http://www.w3.org/ns/prov#value>	"When ???r is a Lambertian or Phong BRDF, methods exist for transforming samples drawn uniformly from the unit square into samples drawn according this importance function over the hemisphere." .
<http://webisa.webdatacommons.org/61967196>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/prov/53901455>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/61967196> .