Fully merge two objects? I have two objects that I want to fully merge into one object. I have gone through the steps of about 10 posts online and all of them leave the former shared edges visible (when I can get them to work at all). In all cases, the former shared edges are still visible. The program still thinks they are two joined objects instead of one, as can be seen if I delete one of the vertices.
How do I get rid of these visible intermediate vertices/edges?
Two objects (before)
Results of joining faces (with dividing line)
Thanks in advance (since I can't write comments).
Delete the edges between both objects;
Click one of the vertices of one of the ends of the objects that you want to connect, and use Shift+s → Cursor to selected, so we can use the 3D cursor's location to move the other object to the exact position of its counterpart.
Since for me the 3D cursor snapped to one of the wrong vertices, I quickly separated the object using p, then g and z to grab it along its Z-axis, and it snapped right in place.
Select both objects, use Ctrl+j to join.
Remove the faces that are currently between the vertices you want to get rid of.
Select the vertices surrounding the deleted faces, and navigate to Mesh → Clean Up → Merge by distance, and tweak the value to delete the 14 double vertices (by turning it all the way down).
Now select the vertices that are left, click Del, and select the Edge Loops option.

Both models are now joined and clean:

(Note: I rotated the model so it fits this page better in most cases.)