This is one of those things where, once somebody points it out to me, I'll see it everywhere - every time. I thought you meant the textures displayed towards the very end of Act II, which mostly repeats the motif we saw on the Nautiloid in the prologue, but I'm pretty sure you mean the beginning of Act II with the Shadow-Cursed Trees right?
I think there are maybe a half dozen Tree models that you would need to replace with something else, some other tree basically, for it not to feel janky.
Perhaps it would work using by replacing all those Trees in Act II with some of the Trees from the Swamp area in Act I?
Not sure if there's a simple replacement method for stuff like that, since at least they're not animated. It's not surprising, if were trying to create an unnerving sense of horror for this part of the game, that they'd play up sounds or visuals that would make many people feel slightly uncomfortable, but then pushed to an extreme, the same thing that makes one person mildly grossed out, might just make it entirely unwatchable for someone who has the legit phobia. I think this would be the equivalent of like unavoidable spiders everywhere for the Arachnophobes. I mean there are ways to avoid the Matriarch and the drider Karniss, but those trees are pretty much everywhere in the Shadowcursed lands, so it might be a bit of a chore.
I wouldn't sweat the name. I'm sure he was griefin' you for spelling it Baulder's instead of Baldur's, though I wouldn't take that to heart. I struggle mightily to type myself. I've been playing these BG games for like 25 years, and I still mistype it that way sometimes. Or sometimes I'll add a U by accident, or drop a U by accident. Cause Baldr is also a god in the Norse pantheon.