Re: Time Remapping with Optical Flow in Shake

I'd ditch the timeX node and do your retiming from the filein node. Shake uses optical flow when you choose the Adaptive option (as opposed to nearest or blend). You seem to have played around with these settings already but i thought I'd go through them here again for others searching this forum about this.

In the filein node, click the Time tab and at the bottom you will find the retiming options. You have a couple of button options for what you wish to do, speed and remap, ...if it is a constant speed go with the Speed option, if you want to be able to change the speed during the clip (e.g. normal motion dropping into slow motion) use the Remap option, this allows you to set keyframes on the graph for retiming from frame to frame. In order to use optical flow retiming set the retimeMode to Adaptive. When using this mode, don't just automatically choose Best for all options, ...sometimes the lower settings can work better (and of course will render faster), it all depends on the shot (yup, experimentation comes in here a bit).
For more info check out page 111 shake4 user manual 1.

p.s. If you wish to use After Effects, the 'timewarp' filter is actually based on the Kronos (optical flow) retiming tech from the Foundry, so it can produce some good effects.