Masonry Gallery pop-up

Hello,

I want to change the animation of Masonry Gallery.
How can get the images ‘pop-up’ like the single image option instead of the 3d animation.
I played a little around with the css in my child-theme and got the following result.

.avia_desktop.avia_transform3d .av-masonry-entry.av-masonry-item-loaded .av-inner-masonry{
-webkit-animation: avia_image_appear 0.2s 1 cubic-bezier(0, 0, 0.08, 1); /* Safari 4+ */
animation: avia_image_appear 0.2s 1 cubic-bezier(0, 0, 0.08, 1); /* IE 10+ */
opacity: 1;
}

Is this the right way to do this modification?

roger