I am not sure what the issue is, but for some reason I have been getting matte black textures, just a solid black that blurs ever so slightly when the view is shifted across them. This is particularly so on some distant trees. Most distant trees show up perfectly fine, but in amongst them, possibly one particular oak, has a deep matte black solid texture. Skyrim detects ultra high settings for my card and rig and I can play Skyrim with no lag etc. I am playing Oblivion mostly to work on my Mesogea mod, but again very occasional lag when I am using nifs that I have not yet optimised. Even with literally dozens of NPC's in a busy city setting I get about 25-30 fps, so the card, memory and rig etc are not the problem.

Any ideas?