Layer Blend not working as expected

When using Material Layers in conjunction with Material Layer Blend using RGB mask the layer at top reveals the background material in areas where mask is not 100%. I wish for the revealed material to be the one underneath it in the stack. I am new to UE4 so I’m sure I am missing something. Any help is much appreciated. Please see screen shots for further explanation. Thanks!

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Layer blend is order independent. For pixels where sum of weight times blend for all layers yields less than 1, normalization can bring in layers with a weight of 0. Consider adjusting your blend maps or dropping LandscapeLayerBlend in favor of using your own order-dependent blend

Thanks for your response . I’m not using the LandscapeLayerBlend; I am using the experimental material layers. Maybe this new feature is not order-dependent? I wonder how I set the weight of these “Material Layers”? I dont see any setting for weight. Is it possible to use a LandscapeLayerWeight node in the material? Any ideas or thoughts are appreciated.