I'm probably going to get some angry emojis for this but i'll say it. I never liked Unreal. Not even the visuals, yes i said it.
Both Quake 2 and even Quake 1 looked better IMO. That's because the architecture of the structures/buildings you explored was far more interesting to look at with more geometry, more detail and better art direction.
Unreal had the "benchmark software" look. Like it was something straight out of an early 3D Mark build. Impressive visual/effects but ugly as sin at the same time.
And sure, that glance at the open area with the waterfall was impressive for most people but open areas in FPS weren't a new thing for me as i had already played Goldeneye's Dam level and the final area of the map where you go to the actual dam with the mountains in the background was more impressive a year before.
The skyboxes were great. And the close up textures made me inspect every surface. But ultimately, the whole thing still has that empty, boxy look compared to both Quake games. Which made it much less interesting to explore and that's why i didn't even bother finishing the game back then.
I was more impressed with Unreal Tournament tbh but i still liked Quake 3 a little more visually because of the art direction again. It wasn't until Unreal Tournament 2003 where i was really into exploring the maps.