I started experimenting with "low-key" lighting in the CORE v2 lighting course before actually watching the video and learning that it doesn't refer to lighting that is physically lower than the subject, and ended up with what I think would be called "cross-key from below". This also led into learning how to use mattes and compositing to remove bounce lighting.
Model is my final from the PRESS START course.
Using shadow linking it's possible to have the under lights shine thru the floor in a non-physical way.
I wondered, what if I wanted to remove the strong bounce lighting? Bounce lighting doesn't seem to link back to its originating light group, but having also just been introduced to compositing from that course I was able to get that to work by combining the fill and key lights on the subject but only have fill on the background, and combine them with a matte.
At first I tried object index, but that produced dark edges because it's 1 bit. Then I found out about cryptomatte, which is alpha based. This improved the edges but not completely, until I learned that for disjoint layers like this you need to set Alpha Over to Disjoint Over.
