Went ahead and picked it up on GOG. Light scattering's broken for me, but everything else seems fine. I played up to the first save point, and I'm not sure if I like the layout change around the second level key. I wonder if, should they ever get around to Turok 3, they'll modify the beginning of Level 4 to accommodate the new ruins that have appeared?
Could you get a video to show us what's happening somehow or sscreenshot at least? We could try to get stuff like that right over to them