Here is something funny: It is actually really easy to do this yellow beam. I really couldn´t stop laughing after realizing how easy...
All you need to do is replace the Spotlight with an Area Lightsource, that´s it... Yes no kidding. You can use the exact same Properties as with the Spotlight lighsource, your Settings are much more accurate than ZKlopers.
So yes I did make Screenshots, but from your Revisited Version instead!!! Terror Engine is also not heavy so you could also just simply run it two or more Times...
I think my yellow beam looks even better than Zklopers with your awesome Settings applied to it instead, check it out from my Archive.org page, download Sad Satan ¶H☺ (Obscure Horror Corner DEFINITIVE EDITION).zip from here: https://archive.org/details/game_20250111_202501