In UE5, Layer Blend can't preview

In the offical course:

It teaches us how to blend layers in landscape material.

However,I plug two textures into “Layer Blend” Node, i also set the “preview weight” = 0.5, but in viewport, it still show a black sphere. But in landscape mode, it works

Unless I mistake what you mean, layer blend is not used for this.
Try “Multiply” instead of layer blend.

I have the same issue. I follow the UE5 tutorials on youtube, because UE5 documentation is HOPELESS on the layer blend topic. None ofthe UE5 tutorails work. A simple multiply works, and so does lerp, but to spawn folliage, Landscape Layer Blend is needed. No matter what I do, I just can’t get the material blend to preview in the material editor… Yes, I tried break attributes after layer blend, which failed. Then I add make attributes between each texture and layer blend, which doesn’t help. But the tutorials on youtube work. I follow them step-by-step, over and over, none of the attempts have any success.

I really hope this gets resolved because I have been having this exact issue.