To create realistic cracking in tyFlow for a "top-down" or surface-level fracture, you can use a combination of Voronoi Fracture PhysX Binds Creating a Surface Crack Simulation Birth and Fracture

• Use rim and grazing lights to emphasize crack edges and silhouette.
• Subtle volumetric dust or screen-space particulates in cracks adds depth.
• Render debris and fine dust in separate AOVs for compositing control.

• Use the generated mask as:

  Fracture the Mesh: Use the Voronoi Fracture operator to define the initial break patterns on your object.