I don’t believe this is working correctly. If all of the actors are snapped to the grid and you group them and then position the collection in the exact center of the grid, the created Blueprint is still offset. This shouldn’t happen because the grouped selection is dead center of the world. Unless the actors all share the same pivot point, it makes creating a prefab from the selection incredibly frustrating. Not to mention that in my test cases, even though every actor is snapped perfectly to the grid, the created prefab is re-aligned to a new position that is fractional IE x: -119.511665 for example. This shouldn’t happen when your meshes are all using perfectly round units. IE two meshes 200x200x200 units should still end up with a location that is a whole number but this is not the case. What you end up with is a prefab that is impossible to align to the grid because everything is nudged by small amounts.