https://docs.unrealengine.com/en-US/RenderingAndGraphics/Materials/CustomPrimitiveData/index.html

This tool allows you to calculate the current texel density of an asset per primitive based on the asset and project resolution

Generates a texture that can be used as a simple resolution checkerboard to compare texel densities with

This tool quickly allows you to insert a mask from a second heightfield into your primary heightfield

This tool allows you to blend several named heightfield layers together using several blending modes

The video shows a full walkthrough from making a model to destroying it in Unreal Engine. Unreal has a great plugin with Apex Destruction to do this. It offers various settings you can tweak to get decent real-time simulations of destruction. Houdini can be used here for doing custom fracturing of models. This is a strong part of Houdini and you could build complex systems, like in Borderlands 3 to get fracturing the way you want it to be. In the video I will mainly use material fracture node, this is one node that offers a lot of settings for auto fracturing models and adding details to that.