Adjusting Outer Frustum Resolution/Quality


I’m setting up a virtual production facility for work. I noticed in this seminar (In-Camera VFX with UE4 | SIGGRAPH 2019 | Unreal Engine - YouTube)

at 18:36 mins Ryan Mayeda mentions that you can lower the resolution of the outer frustum to improve performance of the scene for the inner frustum. However in your documentation there is no mention of how to achieve this or I missed it.

I think this is an important to detail that is missing. Is someone able to explain how to achieve this or point me to resources that I can look into? Thank you.