Shrinkwrap and ConvexHull produce no output when I exposed the object path of an object merge node (in the normal way). I'm pretty sure I've set this up correctly and there's no feedback that anything is wrong. Everything functions fine if I connect it to a normal in-houdini geo.

Am I missing something? I've tried converting the object merge output to various things, but nothing helps. Disabling the shrinkwrap immediately makes the mesh visible in Unity.

I was intending to do this with a multi-slot input from Unity, but even a single input exhibits this issue.

I tried two different HDAs and they seemed to produce results in Unity. Can you provide your HDA?