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Activity Forums Adobe Premiere Pro Boris Light Wrap Disappears then Reappears

  • Boris Light Wrap Disappears then Reappears

    Posted by Claire Presnall on June 11, 2022 at 2:22 am

    I’m using Boris Light Wrap on a nested sequence of keyed footage in Premiere 22. The sequence is an edit of different people, keyed with Ultra Key. It works great until it gets near the end of one clip and then the wrap just pops off then pops back on at the start of the next clip in the sequence. I’ve tried:


    trashing my cache

    deleting and reapplying the effects

    shifting the cut point

    cutting the nested sequence to only the part with the issue

    probably a couple of other things but it’s been a long day.

    I’m running a Mac Pro Tower

    Monterey 12.3.1

    3.3 GHz 12-Core Intel Xeon W

    256 GB 2933 MHz DDR4

    AMD Radeon Pro Vega II 32 GB

    Premiere 22 (22.4.0 – Build 57)

    Footage is 4k 422 Proxy (because why send me nice footage. It’s just for keying.)

    Sequences (main & nests) are 1920×1080

    Anyone else have this happen? Did you find a fix? Or at least a reason?

    My next solve is to output the keyed nests & send to AE to apply the wrap (I’ve already tried keying in AE, but all my AE keyers make this particular footage look chonkalicious, so Premiere wins this round with Ultra Key because why not). But I’d still love to know why it’s doing this.

    Claire Presnall replied 1 year, 11 months ago 2 Members · 2 Replies
  • 2 Replies
  • Mads Nybo jørgensen

    June 11, 2022 at 10:35 am

    Hey Claire,

    Without seeing the sequence it is difficult to visualise.

    I would suggest you look (again, sorry) for following:

    Rogue keyframes – sometimes if you have 2 keyframes in the effect panel very close together, you won’t notice the “rogue” one (Zoom the whole way in to investigate).

    In your nested sub-sequences, has the clip used, been split or similar?

    Same goes, which is one that always catches me out, is where a clip in a sub-sequence is not extended to the length of the clip in the master sequence. Could be something like a transparent layer that remains at standard length.

    Finally, is there any other effects on that specific footage that might impact the effect used – maybe try an switch them off one by one, to see if that changes anything on that section.
    Including checking whether blending modes has been changed on any of the clips for that part of the sequences.

    I know, you have probably tried all of the above.
    But always worth repeating, as you can fault find 20 times across the same space, and still not see it before it suddenly pops out – that is my world 🙂

    Good Luck


  • Claire Presnall

    June 11, 2022 at 4:05 pm

    Thanks. No keyframes anywhere (these are all global effects).

    It’s right next to a cut to a new shot, but at the tail end of a shot that has been showing lovely light wrap for many seconds. The light wrap just gives out about 10 frames from the end of the clip.

    I went through all the effects again, and I seem to have found a solution.

    I went into my nested sequence where the Ultra Key is applied (because Boris light wrap doesn’t see the keyed edges of a non-Boris key if they’re on the clip together). I had applied a global mask to clear out the corners of trace green dirt rather than jack my key up any further and risk chonkier edges. The clip that was losing the wrap is a CU (zoomed in), so the edges are out of frame. I cut my nest, I cut my clip, I deleted the mask from just that 10 frame segment. Light wrap is back on in the main comp.

    I’m not sure why it was cool with the mask up to that point, but it’s working now, so I’m not going to question it.

    Thanks for your suggestions!

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