>> I don't know of any game engine that does it, but you will find some
>> examples of real-time metaballs on shadertoy.com eg:
>>
>> https://www.shadertoy.com/view/ld2GRz
>>
>> I don't know exactly what type of data you want to visualise, but you
>> might be able to edit the script (that one is fairly straightforward
>> to see how it's moving the blobs) to show your data instead.
>>
>
> IIRC shadertoy is only online.

I'm not sure if you can just save the page and run it locally. It might 
need some tweaks. But in the end shadertoy is just a friendly front-end 
to webGL. The shader code should be copy&pastable into a local webGL page.

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