about generate mask

[ZJsonJun]

hi, sorry, I have a problem about mask generate. I follow the following procedure to generate a mask:

1. load the object vertexs from LINEMOD_vertex.npy(you provide)
2. correct the vertexs using Transform_RT_to_OccLINEMOD_meshes.npy(like R*vertexs+t)
3. then projection those 3d vertexs to 2d plane using pose Rt and linemod_k
4. extract the projection area as mask

I do like the above, but the result looks strange:

this, I want that cat's mask
can you help me, what problem?

[ZJsonJun]

@YinlinHu