There is a problem with Visgroups=(1024) (viewed at night time only). I tried this at two tracks and it works for the first hour or so. The object appears for some time when it starts to become dark but I believe as soon as the lighting system makes a switch to night mode (you see a drastic change in gfx, different reflection map, different object lighting) the object disappears. It may show up again just before sunset and disappears with the first morning sun. ...the fire texture in the center of the picture.