Hi,
I tried re-doing so now it’s exactly the same way he did it in the tutorial. The sphere soft mask is working now, however it is still applying refraction where it is masked and as far as I understood from the tutorial it should not be refractive at all in the masked areas 
*EDIT
I did manage to get it working, however it feels far from optimal. You don’t happen to know a more proper way of doing it? Would love to know. (Top left marked are the working ones)
