Setting Collision Mip Level Per Landscape Components
You can set the Collision Mip Level collision for individual Landscape Components which enables you to reduce the Landscape collision complexity even further in non-playable areas of the level.
To set the Collision Mip Level for an individual component in your project, you will need to do the following:
From the Modes panel, click on the Landscape option and select Manage mode.
Select a few Landscape components by clicking on them with the Left Mouse Button. The selected Landscape Components are highlighted in red.
In the Details panel, expand the Landscape Component section and change both the Collision Mip Level and Simple Collision Mip Level to 5.
In the Landscape Manage section under Tool Settings, press the Clear Component Selection button to deselect any currently selected Landscape components.
Select a few more Landscape components and this time set both Collision Mip levels to a value of 2.
In the following image, the Collision Mip level for each of the four outlined Landscape Component has been set to a different level.
Collision Mip Level