X-13 RTRT, A breakdown from another forum in response to growing frustrations with RTRT.  (Items that are specific and searchable terms in CA have capitalized first letters)   There is nothing "wrong" with the new Astral PBR RTRT option. Better understanding of a modern rendering engine may help alleviate some issues. If you are feeling overwhelmed by this info you can always uncheck the option for the RTRT in your Ren