Can some one tell me what this is?

[DNBOF]

It is the horizon. Visible when backlit. Been a bug for a year now:

Horizon line visible through mountains and objects

This is still an issue, it was even visible in the official trailers, please, fix this problem, it kind of kills inmersion when flying at dawn/dusk and is really noticeable. As soon as the sun is down over the horizon, the glare seems to make the line of the horizon where the water sits to jump over the terrain. It’s very annoying. [Captura de pantalla (504)] [Captura de pantalla (506)] thanks!