In order to change mesh LOD material I need to add a material slot? Will this increase draw calls?

Hi

I’ve been trying to make some LODs of a grass mesh I have. Its LOD0 material has wind, and I was trying to make LOD1 use a version of that material WITHOUT the wind so that it doesn’t use up performance far away. However, I found that in order to do this I needed to add a material slot for the LOD1 material because it would not let me just drag a new material into the LOD1 material slot from my content browser.

Will adding the additional material slot increase my draw calls? Or will it remain the same since its technically only using one material per LOD. Does the Engine treat LOD’d materials differently if I have 2 material slots but each LOD only uses one?

Thanks