After some experimenting I found myself achieving nothing
This is default render of the Sphere effect:
After changing the fx file refract vector…
…I managed to produce some sort of reverse-refraction-thing with lines rendering outwards:
But unfortunately this is not the desired effect. What I needed was for image to render inwards, similar to the default rendering mode, but placing the ‘camera’ inside the sphere.
Does anyone know how to modify the script to accomplish ‘inside’ sphere view or something similar?