To change image, drag-and-drop an image file over the canvas
Gradient
Use natural grayscale
Gradient easing
Opacity
To note: Javascript is not running in this browser environment. The canvas element is ignored; instead a placeholder image displays where the canvas would have appeared.
Test purpose
Create a test Picture entity
Create a mapToGradient filter and apply it to the test entity
Update filter attributes and observe the effect they have on the entity