Godot Object/Local Space dissolve shaders.
Even if the object is transformed in world space (moved around and rotated), the dissolve position and offset are preserved.
There's also a variation that allows you to set a dissolve angle/offset.
Shaders and sample project: https://github.com/alfredbaudisch/GodotShaderCollection
Should I put these in godotshaders too?
I published them almost two years ago, re-sharing because they "got lost".
@nekoto helped fix a bug back then too.