Try holding shift down when placing the rug 'block' down next to the wall you want to have it go behind. This will change the rug 'block' placed to a central rug block piece. Then redraw the blocks around the outside of the rug to make the rug update to have an edge. Do not redraw the wall.
So in the picture i included I tried to illustrate that you have to draw the rug holding shift and then add or redraw the blocks surrounding the rug.
Man it has been ages since I last came on this site xD. But with the recent (localized) release of RPG maker VX Ace (and thanks to a bit of money I recently came into possession of ^_^) how could I stay away?? :).
But its been a good 2 years since I updated my profile (seeing as my about me page said I was 15, when im now 17 years of age).
Well anyway glad to be back :). I probably wont be a commonly seen face (or... profile) but I hope to prolong my stay :). And yes my signature is the same as my about me page, mainly due to the fact that im lazy ;D.