This feels like it should be easy… but is it possible to have a fullscreen image contained in a smaller div, and an interaction to animate the mask / div expanding to fullscreen without scaling the image?
Have tried with images, background images, fixed, but the image always scales…
You can play with the Size property instead of the Scale in the animation tab.
Also I positioned my image at the center with flexbox so that it is not anchored to one of the sides.
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Let me know if it was the intended result ! Have a nice day !