In current implementation it 's absolutely useless . Please, give us an access to height , roughness, etc channels at least. And lets us composite / mix materials in Photoshop please. I tried Sampler and I don't like it at all. Would be so much more convenient to do it in Photoshop. And I don't need any 3d preview at all, it never accurate anyway. Just make live lighting filter like in Affinity Photo.
Please, just let the sbsar smart objects have height and roughness layercomps inside we could switch to in properties panel.
Or better do the height as an extra channel like in Corel painter with add, sub and height blend/depth combine blending options. Well, the later CorelPAinter doesn't have really but why Photoshop couldn;t .Especially if it's recreatable by its usual layers.
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