Custom Complex Collision

Hello!

I’m very new to Unreal, and I just discovered the ability to define “automatic” collision shapes inside of FBX files by giving them a specific prefix (UBX, UCX). This seems to always automatically associate the mesh or shape with simple collision, which is really great. These features will really save time.

My question is - is there a similar mechanism to define complex collision for the mesh? For example, if I have some object/mesh that has a lot of edges that would never contribute to collision of any kind, it would make sense to build a custom high-level collision shape for that object.

I know I can use the custom mesh for complex collision (by using the checkbox simple for complex), but I’m hoping there is a way to define both simple and complex custom meshes. Is this possible?

As a related question - is there a page in the documentation or such related to import behavior that would include information such as the prefix options (UCP, USP)?

Thank you for any help!