Yes, needed to read these chapters several times in order to get it rigth because you really need to concentrate since the scenarios can get quit complex. And I often have to come back to “Cycles Encyclopedia” I’m looking forward to a new edition covering the changes in Cycles. And hopefully there will also be an “EEVEE Encyclopedia” as well 😉. Things like for example “Multiple Importance Sampling” that appears in the context of lights, emission objects and environment textures is partly still confusing to me. I need to illustrate things with an image in order to understand what’s going on.