My recomendation: find the lightsource from ZKLoper's build, then screenshot the properties, now open level1 from your build and just add a lightsource and copy the properties from the screenshot. Same for level 2/3.
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
This Zkloperz guy has uploaded Terror Engine 2.1 to his Gamejolt page. Just want you to know.
Have no clue if this is legit... or if it even works, but I see no Reason to not believe it... yet. He would be really stupid when he uploaded something malicious.
This is the Link: https://gamejolt.com/games/terror-engine-reborn-2-1/1047175