Render to infinity!

Is there an easy way to render an object to infinity like a mountain.

I’ve got a room that has a view of a mountainous vista in the distance but even a few metres into the room as soon as you get closer to the edge perspective has an effect and makes it look closer than I want it to be.

Additionally, I’ve tried moving the object as far back out of the world sphere indicated in the orthagonal views but it doesn’t make much of a difference?

Why not use environment map? If you can limit player movement to interior it can be pretty viable solution if you want more parallax then just use mountain cutouts mapped on planes.