This is a black hole effect I created using materials and particle emitters within unreal engine 4. The effect was achieved by mixing methods from UnrealCG and Dean Ashford (technical artist youtubers). Here are links to their videos: 

https://www.youtube.com/watch?v=iEyjmSxI2Vo&t=1600s

https://www.youtube.com/watch?v=LlgKZoq4j2o&t=26s

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