public PaintJob(MeshFilter mf, Renderer r)
{
meshFilter = mf;
renderer = r;
_stream = r.gameObject.GetComponent<VertexInstanceStream>();
verts = mf.sharedMesh.vertices;
normals = mf.sharedMesh.normals;
tangents = mf.sharedMesh.tangents;
// optionally defer this unless the brush is set to position..
InitMeshConnections();
}