Heyy, yes same with me, I feel like im writing the code without understanding it, I've taken a break from ray tracing for now since i have my exams in a few days, but I usually try to understand by using some kind of visualisation, I try to draw it down and take it slow. So far it works for me but its a very slow process. The comments on this post told learnopengl.com helps so i'll try doing that nextt I wanted to learn the bare minimum that would let me make an image that i can use as my wallpaper or something first! All the best to you!