--- title: "SDF Iris" description: "Shader transition with signed distance field iris reveal" --- import { InstallCommand } from "/snippets/install-command.jsx"; ## Install That writes one file: `compositions/sdf-iris.html`. 04 / 14 SCENE A SCENE B SDF Iris Prompt "use sdf iris shader transition" Aspect-corrected circle SDF opening from center. Triple onion ring glow with warm exponential falloff. ``` ## Usage After installing, add the block to your host composition: ```html ``` {/* hf:generated-footer */} Tagged `transition` `shader`. ## Related topics - [Browse the complete Catalog](/catalog) - [Add assets and Catalog items in Studio](/studio/assets-and-blocks) - [Build a richer composition](/go-further)