I’VE FIGURED IT OUT!!! It was the “SkyLight” that was causing the exposure. I’ve deleted it, replaced it with another Directional Light with “cast shadows” function off, and the custom renders came out perfectly (minus some frame mishaps).
So the SkyLight was the problem but I don’t know what the issue for it was. I also can no longer use the “Lens Flare” option on my PostProcessVolume box because the skylight is gone. If I only know what was wrong, I could keep my skylight, leading to more creative representations of my scenery. What do you think?
FYI: I’m also going to tell other threads about this since I’ve posted this on other threads.