https://imgur.com/a/ITgKe

 

In the ghost scene in the desert camp the ghosts are almost completely invisible.

I remember that other players said this before.

But in beta version 2 the ghost scenes looked fine for me. I was able to see the ghosts.

Maybe this is related to this:

 

I have defeated the sand worms and the desert wurms/delemgans in the desert.

After the battle the glowing that indicates loot is very hard to see.

I did not see it at all for the worms and I had to look carefully for a long time until I saw the glow of the other enemies.

 

Both things (ghost scene and enemy loot) happened during daytime, not at night. Maybe this is importent for visibility.

There was the ghost scene in front of the ruin entrance and the ghosts are much better visible now.

Its hour 22 in the game, so maybe visibility of ghosts is very dependent on the time.