Shader Effects for objects slowly cracking

Help Shaders
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1

Godot Version

4.5

Question

I am not sure how to implement this shader. Please see the following:

From both videos, the floor slowly has cracks creeping further and further. In the first video, a bit further from 1:12, we also see that the “invisible” walls of the stage also has these cracks creeping further too.

In Godot Shader, how to do this?

2

The first video looks fairly easy to replicate with multitexture; you could have a “cracked” texture, and mix it in proportionally.

The second looks to me like they’ve got pre-shattered geometry in addition.