This made my DK2 project functional again on the HTC Vive, almost untouched and using Post Processing (DOF and Film but had to turn off AO which was running fine with the DK2). The parts that were dropping to 45fps remained solid at 90 with almost unnoticeable visual change. I hope something like this gets introduced in the official UE4 soon. For those who had problems getting it running, it didn’t work for me on the first trial because I forgot to select the 4.11-ofr branch in the cloned repository.