Nuke 9 is pretty impressive!

I'm doing some projection based cleanup work and crunching through 4K exr plates is pretty slow with Nuke 8. Opened the same comp in Nuke 9 beta and voila, whole thing just flies! Not sure if it is the multi-threaded exr reading or improvements to scanlinerender but speed difference is definitely multiple times. Great work Foundry team!

Nuke - smart cloning with time offset

Just a little snippet I'm using right now. If you need to clone from a certain area in plate but don't want to stabilize it and use a tracker as clone transform base instead, changing time offset of clone source shifts the area you are cloning from. To keep the same relative clone source area while changing time offset, use this expression in clone shape or stroke source transform:

Tracker1.tracks.3.track_x-Tracker1.tracks.3.track_x(frame+source_time_offset)

It allows easy changes in time offset and still clones from the same relative location.