SIGGRAPH ReSTIR course materials are amazing. They also just uploaded Cyberpunk Overdrive slides. Indirect/emissive/skylight is handled by "naive" BRDF sampling. Analytical lights use MIS to mix ReSTIR and "naive" BRDF sampling (reused indirect rays). http://intro-to-restir.cwyman.org/

Turns out that painters also struggled with shadows: https://thereader.mitpress.mit.edu/the-art-of-the-shadow-how-painters-have-gotten-it-wrong-for-centuries/

Found this gem while reading insightful interview about programming langs: "The two schools of thought, for example, on the use of IDEs and how you write code, for example, there's a whole class of people who just printf their way to debugging. Then there are others, for example, John Carmack famously fall to this category, John's a legendary Visual Studio user, where you allow the debugger, you allow being able to put a break point, inspect the state of your program." https://www.aarthiandsriram.com/p/our-dream-conversation-anders-hejlsberg