I have the same problem as Chasington and Valikdu, in that the Web spell animation destroys my framerate and makes the game pretty much unplayable. The fixes here didn't work for me either.
So I went into NearInfinity and looked at my own character's Web spell, and saw that it was using the spell animation file spwi215.spl. Then I went to my installation directory and searched for that file. 13 versions came up, different backups in different mod folders. four of them were 1kb in size, three were 2 kb in size, and six of them were 14 or 15kb. I copied all of them into the override and then loaded up the game to see what the animations showed. Here's my results:At this point I didn't want to go through every single file, because its obvious that the large file sizes are the ones that fuck up the game. In the end I went with the 874 byte one that I found at first. It works and doesn't mess up the game.
- spell_rev\spwi2##\spwi215.spl: 874 bytes. Showed standard bg2 webs going out in a spread on spell cast. No actual animations on the ground. Half the original spell? Or maybe I'm just in the Copper Coronet?
- !BInfinitySounds\Backup\1\SPWI215.SPL: 874 bytes. Same deal as above. Pretty predictable based on the same byte size.
- iwdification\backup\30\SPWI215.SPL: 13.2 kb. Framerate-killing Entangle-looking glowing crap with a fog effect. Exactly the kinda thing I want to avoid.
I've put one of the 1Kb files into Override. The trap webs don't screw up the game anymore, but the spider webs are still the crap ones.