Wall components have caps when joining walls with a structural core in Architecture Posted June 4, 2012 One note here....I've had situations where I've used the component join tool to fix these joints and at times I've wanted some components to be square and some to be mitered. However, later I've modified the texture assigned to the Wall Type and when the walls get replaced as part of the wall type update process...all of my custom component joining goes away and I return to my default wall join. Very frustrating when tweaking a texture is often the one of the last thing you do long after you thought you were past the floor plan development. Submitted this to tech support over a year ago. Haven't tested with the latest service pack.