If you're using UnrealEd that comes with Gears of War, I would have to say ditch it. UnrealEd that comes with Unreal Tournament 3 works rather well in XP and Vista. I would suggest, if you are using UnrealEd/UT3, updating your GPU drivers and ensure you aren't forcing tripple buffering with nHancer or other driver tweaks,…
I'm using the UnrealEd that came with UT3 with vista and fully updated vid drivers. I've been trying to fix the problem for a while now, ah well. I see Toolbag has an issue importing my .Objs but I'll look into that, looks like it's more for the Maya crowd. I'll certainly check out yours Xoliul and Sandbox. Thanks guys.
So. After multiple reinstalls, a single OS reinstall, and a sizable chunk of time devoted to forum trolling for an answer I've officially given up on using my copy of Unreal Engine 3 for previewing my work, on this PC. The issue involves it failing WHENEVER I attempt to open the material editor, rendering it nearly…