If you add a rule that affects a material, the effect will be on the full object and not just on the material.
It would be very helpful to have this option to identify faster the position of some elements in a complex item or, better yet, to blend out all the other elements and have only a specific material visible in 3D.
In a way, it already works with cores and finishes to subdivide complex elements; it should be possible with materials as well.
Open