hey @BrUnO_XaVIeR I totally agree with you brother, same story, I have been requesting info about RHI and the rendering system in general for years, but at some point I gave up, I bought Visual Assist as well and now reading the source code feels like reading a good book, but it takes time of course.
For those who haven’t read a single .h you will soon realize in the moment you do than the actual online documentation is auto-generated from there.
Btw regarding to visual assist it has been said multiple types in the streaming that not a single dev at Epic works without it.