Hi and thanks a lot for your answer.
This is not what I'm trying to do, and I'm sorry if I made things confused.
I want to make an animation, that's right.
I want to use the erosion, crackling engine to generate n meshes, one per "step"
What I call step is "like an" iteration.
Let's imagine this.
I create a scene.
Just a block of terrain.
I add a modifier making it crackling.
I render the mesh.
Then I increase the amount.
I render the mesh
I know batch generated with command line is possible.
The longest part here, after having built a scene, is to generate the script strings.
But creating a small piece of program in whatever I know (c++, Java or whatever) for automatically generate all my strings for generating n meshes increasing/decreasing some exposed properties at each step is not hard.
After that, I'd have a set of meshes.
Aesthetic wise, I don't want perfect transitions between my meshes as I can interpolate if needed in my render system, later.
I already worked with that workflow, I mean getting a set of meshes animated like this.
Here, I want to take benefit of the powerful system of erosion, and crackling, especially, to generate tons of meshes.