Infinite terrain with morphing biomes help

Hi, I have been looking for a solution for this for a while either in an asset or within Unity.

I would like to create an infinite world with different terrain and biomes that morph into each other. I would like to be able to call up the biomes at runtime in C# and have them blend seamlessly. So if I want snow, desert, lava, mountains, ocean, grassy plains, etc., all I would need to do is call a function and it would morph into the desired biome. I would like this all to look fairly realistic if possible.

Can anyone help out with how to do this? Thank you.