After weeks of fighting with the stump mesh, I’ve finally figured out how to properly handle it and bring it into Unreal. Importing the stump as one solid mesh, bark and top, would constantly cause issues with importing and exporting the mesh. Maya especially can not handle the mesh very well, so I had to separate the two sections out in Houdini, then reimport them into Unreal. This seemed to have fixed all of my issues with import and export, as well as freeing up some UV space. Now that the mesh is finalized and set in its place, I can take some time to fix the bark texture and create a texture for the top area.
Next time: I hope to get the terrain textures finished and some grass added. Maybe a sapling too.