Using any material and applying it to imported mesh results

So on an imported gltf mesh (grass), I’m trying to apply a fur material to it and the results seem to be some sort of shader problem? I’m not sure.

I get the same problem with using water material. I haven’t been able to get it in at all and it results in these tall deformed black meshes as shown in this video:

Any help would be very much appreciated

This is what I used for reference:

Without a repro it’s going to be difficult to help… Do you have any errors in the console log?

I don’t know the exact details about fur material, but
water material similar situation for image can be based on these values:

the value that silences it:

The reason it is black may be because there is no object that needs to be reflected or because the reflected sky is black.
Or maybe it’s a color issue.