Have you ever seen those mechanical advertising boards at sporting events that rotate on occasion to show different ads?
With much effort, I was able to make one that can display 3 different billboard ads. The billboard was made in 4 sections that rotate separately. Each ad displays for several seconds before it rotates to the next one.
If you wish, feel free to place different advertisments on it other than the ones I used. I just made some simple, basic advertisments for the demo. permission is also granted to place it on any track model download sites.
DOWNLOAD 3-way billboard model and textures:
http://mtm2.com/~bigdogge/download/3_way_animated_billboard.zip
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I also placed a sample of it on a small test track for viewing/inspection purposes. The billboard only displays properly on one side (as do the real ones).
DOWNLOAD demonstration track:
http://mtm2.com/~bigdogge/download/test-track_ani_3-way_billboard.zip
It took me several hours to create, due to the difficultly of mapping it properly. I hope you find it useful.