Impressive ground view improovements, good improovements overall.
I noticed that the lighting of object is diffrent with the optimisation, when i switch the op object on the cieling is lighted a bit, i actually like it makes the tower feel more comfortable. Still i think the optimisation shouldnt change the brightness of the objects ?
The handle of the coffee cup gets darker... looks more solid and profiled.
Did you change the light calculations with the optimisation to, or is it another part of new code that gets switched on/off on accidant in the test?