Question Recommandation for metaballs implementation

Hi all

I need metaballs (in 2D) with smooth union for a future game.
Right now I have a shader able to display 4 balls using SDF, correctly textured, with simulated light diffuse, fresnel and specular, giving the shader some config info for each metaball: size, position, texture, etc...

However I m afraid that I ll enter performance issue, as I need to display up to 60 balls on mobile kind of HW.

• What would be your recommendations ? I would like to avoid doing everything on CPU as I need to keep load for other game stuff.
• Is it possible to ”stack the shaders" thus calculating the SDF in different ones? Is it even bringing any performance benefit?

Tx!