Look at the following picture....

http://netmation.com/kitwire.jpg

Need to seal the long strip of a hole upto the outlet. Can something
like this be done with just drywall mud without any other backing.
Also the rest of the wall has a 3d texture to it. Is there such a
think as texture tape to make the patch look simlar. How do
drywallers even get the different textures on a wall?