I've checked the two-point perspective issue again and recalled why I haven't implemented it.
Sketchup API doesn't expose any methods to check if camera is in 2-pt perspective mode. (proof: http://sketchucation.com/forums/viewtop ... 80&t=58785
Also, when being in 2-pt mode camera position is not updated, and there are no parameters that are being updated so it's not possible to tell what is happening.
I hope SU team will fix this in SU2015, 'cause I have everything from Octane side to support 2-pt perspective.