I import a plane to act as the billboard for lod level 4. Obviously I give it a different material than my other lods. However as you can see in the picture below two materials are displayed for all my LODs (lod 0 in the picture) which troubled me.

The m_tree_combined_billboard material will only be used when LOD4 (my billboard lod) is used correct?
The m_tree_combined_billboard material will only be used when LOD4 (my billboard lod) is used correct?