Testing the feComposite element and that the 'k2' and 'k3' attributes are animatable. The result is an animated dissolve between two images.
Reload the testcase or click the image to run animation again.
The test has passed if there is an animation effect that gradually dissolves a photo of a tree into an image of a bird over the course of two seconds. The final result is that the bird is fully visible and the tree photo is invisible.