Where to find them: .../CityCore_Paris/MasterMaterial/MaterialParameterCollections/...
The Material Parameter Collections allow you to manage global parameters for materials, including properties like dirt, wet surfaces, puddles, emissivity of specific materials, and more.
Editing Wet MPC example:
Editing Night MPC example:
If your scene uses a Day/Night Blueprint, you should modify the "Building Emissive Intensity" and "Other Emissive" parameters directly within that blueprint:
