Metablobs are an oldschool demo effect that i always loved. Strangely enough that you only find some code snippets but not a professional solution on the net. I decided to create a solution for Unity that gives you a lot of options to create a huge range of totally different visual results. As the Metablob algorithm is a worst case szenario in terms of algorithm complexity O(n²) you can only have a realtime solution with shaders. My solution acts as a fullscreen effect so it requires Unity PRO.
To make it more useful in Unity you can use normal GameObjects to define a Metablob. The scale, color and position of a GameObject defines a blob in the shader. When you render the effect to a RenderTexture it is possible to create effects beside screen overlay.

Unfortunately this is only a DX11 solution (we use Compute Buffers to feed the shader with the blob data)

Get it here on the Assetstore !

Documentation as pdf