[Closed] Attach Mesh problem – faces becomes flipped

with mesh + mesh or poly , no normal lose

2 mesh object with Addition syntax
or use polygon to attach

planes.jpg1276×790 20.8 KB

the problem with specified normals is theres no way of replicating the plane on the left without them, Max will always set them to straight up/

em = Editable_Mesh()
obj = $Plane_001
newmesh = em + obj

attaching as editable poly will preserve the specified normals but the underlying faces will still be flipped e.g the following

planes2.jpg1276×790 26.4 KB

will render as

It looks good in the viewport, but when the object is rendered, as Klvnk showed, the faces are still flipped.

I don’t think they are same
2 mesh attach reset 2nd mesh normal to face normal
others nothing changed
all render are right with final state