Geting Creative?

Siding has turned our to be a monster job, not to mention the fact that the clear 6.5"cedar is EXPENSIVE. So we are trying to keep what we have and make the new look like what we have.
The old entry to the upstairs is now framed off but it looks nothing like the rest of the back addition which appears to have been a porch originally, then framed in. The reason I say it was a porch originally is that it has a half-wall bench type structure with a broad flat top which was then framed up on top of again. the result is two walls, one on top of the other, offset at differing depths. Making this look natural is going to be hard.

You might not be able to tell at first glance but the new section is one piece even with the bottom. The left of the window is actually out nearly an inch but the old wavy-glass window offers a transition which deceives the eye just enough. We even got a little lucky matching the middle trim with some scraps we had around. Not bad for a pair of weekend warriors.