The MaskImage property in the Sandbox.UI.BaseStyles class represents the mask-image CSS property. It is used to specify an image to be used as a mask for an element, allowing for complex visual effects by controlling the visibility of parts of the element based on the mask image.
To use the MaskImage property, assign it a Texture object that represents the image you want to use as a mask. This image will determine which parts of the element are visible and which are hidden.
// Example of setting a mask image for a UI element
var styles = new BaseStyles();
styles.MaskImage = Texture.Load("path/to/mask/image.png");
// Apply styles to a UI element
var uiElement = new UIElement();
uiElement.Styles = styles;