Setting Appearance of Normal Maps in Unity

This would be probably stupid question, but I have a problem. I made up a scene in 3ds max with 3 level of details layers. In LOD 0, I applied on my object diffuse and normal map. For the appropiate object (with different geometry and different names) in LOD 1 a 2 I applied in material editor new material with only diffuse map (same texture like in LOD 0), because i dont need normal map anymore.

But in Unity, normal map appears on the object in all LODs. can somebody tell me why ? I understand that the objects in different LODS share the same diffuse texture, but why normal map is showing in LOD 1 a 2 even though I never applied normal map on those objects in 3ds max.

I tried to change material shader on those objects in LOD 1 a 2 from bumped diffuse to diffuse, but normal map then disppears also from LOD 0.
thanks in advance for the reply

First of all, you should’ve post this on UnityAnswers, not on the forums. But anyway, you have to apply different materials to the three objects. One for every LOD

Posting on the forums is fine, but the works in progress category isn’t appropriate.

–Eric