Hi Andrew,
The min draw distance is locked to the HLOD Outliner Window where you can select and change the Draw distance there for the HLOD Levels, but not for a specific HLOD actor.
From what I see you shouldn’t need code directly to adjust this.
- Open the HLOD Outliner Window (File > Window >)
- Bottom panel LODSystem you can select the HLOD Level X
- Mesh Generation Settings > Transition Screen Size
As you adjust the screen size there, if you have an HLOD actor selected in the scene you can see this value change via the details panel as well as you adjust it up or down.
-Tim