Hi Gunther, I did a screen capture to show you my experience. The first pass is using Mask Version 1. The second pass is using Mask Version 2. I know you said to forget version 1 but please just humor me. I unfortunately do not get any defilckering when using mask version 2. Version 1 continues to provide great results. I've updated to the latest version of LRTimelapse (v6.0.1).

https://vimeo.com/687488061
pass: lrtimelapse6

Thanks.

Do you have the latest Adobe DNG Converter installed? That's important otherwise it won't work properly.
Lightroom >= 11 will only work with Masks 2.0. But in order to also see the right results in LRTimelapse, of course, you'd also need the appropriate DNG Converter. You can find the download links here: https://lrtimelapse.com/install/

That was the issue. I had version 12.2 of the DNG Converter and the latest is 14.2. Sorry I missed it. Thanks for sticking with me. I did the full workflow (keyframes, LR editing, etc.) and got an excellent rendered version.