It is terrain covered in dust, fog and smoke. 🤔
Could you cut the allusions and tell us what you see as a problem here?
@holger1405 Take a look at the screenshot @sweetpoison0011 posted, there's an opaque curved background feature obscuring the Reapers legs. I believe this is meant to be transparent fog or a similar effect, not terrain (if it's terrain, it's oddly colored and smooth).
I don't believe this is how it looks in the original game, I noticed this while playing Legendary Edition as well. I pulled a screenshot from a video of the original game of what I believe this effect is supposed to look like, notice how the legs are visible through the effect. If someone could get a better in-game screenshot from the original ME3 in the same location as the original post that'd be appreciated.
For my shame, I don't have a save on that moon because now I'm curious if that occur only on screenshots or is visible during the play.
