Hello every body,
i would like to know if it's possible to have a preview with changes made by Lightroom before exporting wtih this software.
Thank you and happy new year from France !

You will have the preview in Lightroom, but not in LRTimelapse. Just check the keyframes in Lightroom, they will give you a very good perception of what you will get. You can trust LRTimelapse to calculate the intermediary images nicely and smoothly.

ok thank you Gwegner. So it's not easy to know what will be the final result, specially with hollygrail. A good thing is to have the final preview in Lrtimelapse with changes made by Lightroom after clicking "autotransition". Have a good day !