Actually, I think I should have said "First Person View" instead, as I'd like to be able to see the painted ceiling in build mode in case I want to change it. Sorry for the confusion.
@Starfree I have the patch, and as far as I know, the camera that was added to build mode is the free camera (you press just the Tab key to open it in both build mode and live mode. In live mode, the first person camera (the one that lets you see from the active sim's view) is shift+tab. As far as I know, they didn't add first person camera to build mode, just the free camera. (Haven't tried it myself though) You can still see the ceilings using the free camera mode, you just have to use the WASD keys and the mouse to move the camera around. (With the Q & E keys adjusting the height of the camera)
Hope this helps