Hey there,

I'm working on a pipeline in TOPs in which a bunch ob objects are manipulated and their textures baked to vertex colors using an HDA processor. I then output the resulting meshes using a ROP FBX TOP.
When importing these fbx files into Unity, I get two sub-meshes and two applied materials (called "default_material" and "blinn1"). Within Houdini, I can't see any data on my meshes that would indicate this, in fact, I cleaned up all the unused attributes in the end so I'm left with just a few attributes displayed in the node info:
Point: P
Vertex: uv
Primitive: Cd
Detail: a bunch of custom attributes.
No groups.

Are there any hidden attributes that could hold the information about the materials and the sub meshes?
Is there any way to get rid of them, I mean, somehow merge them into a single mesh with just one default material?
I've attached an example fbx.

Thanks for your help!