Thank you for the quick reply :) I've already done that, actually. My ini files are customized with a mix from the S.T.E.P. guide and my own tweaks. It's the same tweaks I've been using for years now, and this has never happened. As an aside, my ini's aren't in the default location. I use Mod Organizer. I suppose I should have stated, I've been doing this for a while. I customize many mods I use and make my own. This is the first time I've gone into modifying lighting effects (since I got a decent enough computer to enable me to run a good enb). My base loadout is from Neovalen's Skyrim Revisited guide on the STEP site. I altered a good bit of the guide but stuck to the enb and lighting mods as he instructed, since my knowledge of such things is limited. I've fiddled with the ini settings backwards and forwards. Finally putting them back to a semblance of what Neovalen recommended. The settings the vanilla game recommends, by the way, are "Ultra". When I go back to my vanilla profile in Mod Organizer the weird shadows aren't there, since I have no mods activated on that profile and the default, vanilla, ini's recommended by the game on initial startup.