Good idea!! - I tried this but the problem is I must render my orb as opaque or you can see some spiral quads through it in a most unpleasant way. 
it could be a ring texture sorting over the sphere it will make that purple edge look more like this and it might let you animate it with the collapse to have some fun
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Nice work! Looking forward to what you create next 
Feels like your fx is the light version to my evil void 
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Oh yes I love yours so much! Your post was what got me on Harry Alisavakis’ site! Thank you <3
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