Program that uses grayscale images to make transitions I remember some old video editing programs used a grayscale image to be used as a transition pattern.

Basically what they did was using the different levels of a grayscale image as a step for the transition.

Here is an example. Given the first image, when the program was analyzing the gray level marked with the red line as a threshold, the transition would look like the image below.



Do you know if that can be done in a free program like Davinci Resolve, Hit Film, probably Blender?

And a tip of how can be implemented?

images by pixabay
What you want is called a Gradient Wipe in Premiere Pro or a Luma Fade in Davinci Resolve.

Just make sure your gradient image is a 3rd layer as long as your transition, and is selected as the 'gradient layer.'

(This should be a comment but I don't have enough karma to comment in this forum. Hope this helps :) )