Editing Portal effect?

I’m currently attempting to edit @EgoMoose Portal effect to allow a portable “bigger on the inside” effect.

I’ve ran into an issue when rendering the outside environment -
Ideally, I’m wanting it to take note of Parts ONLY within a 1,000 Stud magnitude and render those.

Currently, it works fine for a one-off. However, I’m unable to get the outside environment to update accordingly meaning when they Player goes past the 1,000 stud barrier, nothing more is rendered.

I’ve attached the place file so that those able to help can take a more indepth look?

BOTI.rbxl (60.6 KB)