optional checkbox to include optical flow in normal cadence
-starts by getting flow between turbo_prev_image and turbo_next_image.
- after getting the flow, it warps the turbo_next_image with negative flow to match prev
- then, normal image warping during cadence happens
- then it warps the flow field to match the animation, first converting it to relative for warp, then back to absolute flow
- I calculate the flow division for each tween value and divide that by two.
- it then applies that tweened flow to the prev and next image
reallybigname
hithereai
aredden