I have had a sudden change in the size and shape of some aircraft lights and airport lights. They are now stark and round. They look very fake. any ideas on how to redo these to more realistic lighting?

The first thing I would do would be to review what I had added to FS in the past few weeks - or whatever time frame is appropriate to the time you noticed the problem - and uninstall the additions until you are back to "normal".Hopefully you made backups of any files which were replaced by any of the enhancements you may have added.Keep us posted.

More than likely your halo.bmp was replaced.There are some very nice edits available in the library, that you should look into.

I have put in a new halo but the very basic, round lights are still there but now with the halo effect. The rumway lights seem too bid and flat.