It usually works fine but for the life of me I can't get a single material to come in. The output of the HDA shows shop_materialpath in the attributes but no material is created. The little checkbox “use native houdini materials” is checked too. I tried deleting the temp file but that doesn't do anything. I'm going to try reinstalling because I've spent hours at this and can't think of anything else.

Edit:

I was finally able to get the attributes to come through and automatically assign the unreal material but now the materials don't show in the UE viewport. The objects have the default grid material, although the asset shows that the materials are assigned.

Is the plugin doing something to the mesh that could be causing this? I applied the same material to a cube in UE and it works fine.

Update: I figured it out, the material I was assigning had a problem with the texture sample node. Once I sorted that out the materials appeared.