Another Seamless Corner Window Thread! Question please..

[MulePacker]

So Im trying to generate a proposal to create some work for myself. seamless corner windows is part of that proposal. I have not found a good tutorial that I understand on how to create a corner window...

Im pretty new with this program, and Im curious on why they dont have a corner window option! haha... In any event. I've read a lot about how to do it, But in reality Im not advanced enough yet to really understand how to do it. Please help? Picture=three points in need a corner window, from floor to the top of elevation of the rest of the windows? Thanks

Jake