Shapes in clipping and masking - and how to use them - Mozilla Hacks - the Web developer blog
CSS & SVG Masks (Test cases)
Image Mask Effect in CSS & jQuery | CodyHouse
CSS Masking | How Does Masking Work in CSS? (Examples)
CSS Masking Image, Text and Animation | Complete Guide
Using Masks
svg - Avoid hit area on link masked with css mask - Stack Overflow
CSS Mask and Clip-path property Effect on Images | Quick Guide
Cutouts with CSS Masks | Jay Freestone
CSS masking - javatpoint
CSS Mask Image Examples : Image & Video Background
CSS Masking - The mask-image Property
Text Masking Using SVG | Mask Video | SVG - CSS Tutorial - YouTube
CSS masking - javatpoint
Image Cut-Out Effects using CSS or SVG – Bram.us
Addy Osmani on Twitter: "Great guide to CSS mask-image: https://t.co/fWLWAGdVvM ~ specify an image or gradient to use as a mask layer. By @rachelandrew https://t.co/QOptFxOHSa" / Twitter