billboard material compensated for object rotation?

So… I’m trying to make a billboard material for a tree LOD, but I’m having issues where the object’s rotation is messing with the billboarding.
This is two meshes:

this is what my billboarding looks like:

this is my material:

how can i fix it so that my billboards always face the camera? I can’t figure this out. i think i need the objects rotation to plug in there somewhere, but I cant find an object rotation node in the material… any help?

ok so that might not be the easiest thing to read…
the billboarding works, but is always skewed against the mesh’s rotation. if the mesh has no rotation, the billboarding is fine. with any rotation, the billboarding is skewed along that rotation.
here’s some pictures that might make more sense:
this is the mesh. notice that the trees have different rotations:

here is the same meshes, but with the billboard material. notice how the billboarding doesnt exactly work…:

So I figured it out. Here’s the new network that works: