How would I make atmosphere transitions?

Hey, so I'm making a game and I have gotten stuck. I have no idea how to make an atmosphere transition. Like starting on land and the higher you get the darker the sky gets, like in bubble gum simulator. I'm not requesting anyone to write me a script, just some ideas?

If you set a SpecialMesh scale to negative (for example, -10, -10, -10), the figure turns inside out. This is useful to make sky-like figures.

In your case, you could spawn an inside out sphere with a massive negative MeshScale (big enough to outrange the camera maximum distance from the player) and weld It to your character to create a blackness effect. You could write a script where the Sphere transparency decreases slowly to 0 as the player travels higher.

For a code like that, you will requiere a LocalScript, so players will only see their own assigned sphere mesh.

(Sorry for my english)