optical problem/illusion - Help needed

254096-parallax.jpg

My game has goal locations within a circular level that I want the player to get to.

The player MUST use environmental cues such as the two stars in the image that represent two mountain landmarks in the map to get to the goal locations.

Now here’s the problem if the player starts from position 1 he sees the mid point of star one (mountain 1) and will use that as a reference point to locate the goal.

However, when the player starts from position 2 that reference point is no longer valid due to the shift in the visual perspective between the location of the goal and the mountains and so it appears that the goal is in an entirely different place, when its not moved at all.

How do I get it so that the mountains/background objects are always a fixed distance away so the player can get a better and stable visual representation of where the goal is regardless of their position in the map?

I’ve tried using a HDRI image as a background for the skysphere, but feel the skysphere is being rendered too close to the map and needs to be scaled up at to at least 6 at which point it doesnt render correctly and is made useless.