Blender 2.8 - where is Multiple Importance Sampling? I am working on  my render and I have an hdr word background, I am trying to activate Multiple Importance Sampling like in previous Blender and I can't find it. Anyone knows where is it or what changed? thanks alot in advance.
It is under the Properties Window > World Settings > Surface change Sampling from Auto to Manual.

Multiple importance sampling is only available for volumes, under Volume > Sampling change from Equiangular to Multiple Importance.