diff --git a/extensions/Lily/LooksPlus.js b/extensions/Lily/LooksPlus.js
index 2a7bc3bfe5..c987b334d6 100644
--- a/extensions/Lily/LooksPlus.js
+++ b/extensions/Lily/LooksPlus.js
@@ -20,6 +20,30 @@
     return true;
   };
 
+  /**
+   * @param {RenderWebGL.SVGSkin} svgSkin
+   * @returns {Promise<void>}
+   */
+  const svgSkinFinishedLoading = (svgSkin) =>
+    new Promise((resolve) => {
+      if (svgSkin._svgImageLoaded) {
+        resolve();
+        return;
+      }
+
+      const handleEvent = () => {
+        cleanup();
+        resolve();
+      };
+      const cleanup = () => {
+        svgSkin._svgImage.removeEventListener("load", handleEvent);
+        svgSkin._svgImage.removeEventListener("error", handleEvent);
+      };
+
+      svgSkin._svgImage.addEventListener("load", handleEvent);
+      svgSkin._svgImage.addEventListener("error", handleEvent);
+    });
+
   /**
    * @param {VM.BlockUtility} util
    * @param {unknown} targetName
@@ -176,6 +200,7 @@
             opcode: "replaceCostumeContent",
             blockType: Scratch.BlockType.COMMAND,
             text: Scratch.translate("set [TYPE] for [COSTUME] to [CONTENT]"),
+            hideFromPalette: true, // needed for compatibility, also superceeded by skins
             arguments: {
               TYPE: {
                 type: Scratch.ArgumentType.STRING,
@@ -192,6 +217,21 @@
             },
             extensions: ["colours_looks"],
           },
+          {
+            opcode: "replaceCostumeContentNew",
+            blockType: Scratch.BlockType.COMMAND,
+            text: Scratch.translate("set svg for [COSTUME] to [CONTENT]"),
+            arguments: {
+              COSTUME: {
+                type: Scratch.ArgumentType.COSTUME,
+              },
+              CONTENT: {
+                type: Scratch.ArgumentType.STRING,
+                defaultValue: "<svg />",
+              },
+            },
+            extensions: ["colours_looks"],
+          },
           {
             opcode: "restoreCostumeContent",
             blockType: Scratch.BlockType.COMMAND,
@@ -483,6 +523,32 @@
       }
     }
 
+    async replaceCostumeContentNew(args, util) {
+      const costumeIndex = this.getCostumeInput(args.COSTUME, util.target);
+      const costume = util.target.sprite.costumes[costumeIndex];
+      if (!costume) {
+        console.error("Costume doesn't exist");
+        return;
+      }
+
+      //This is here to ensure no changes are made to bitmap costumes, as changes are irreversible
+      //Check will be removed when it's possible to edit bitmap skins
+      const format = costume.asset.assetType.runtimeFormat;
+      if (format !== "svg") {
+        console.error("Costume is not vector");
+        return;
+      }
+
+      const content = args.CONTENT;
+      try {
+        renderer.updateSVGSkin(costume.skinId, Scratch.Cast.toString(content));
+        renderer._allSkins[costume.skinId].differsFromAsset = true;
+        await svgSkinFinishedLoading(renderer._allSkins[costume.skinId]);
+      } catch (e) {
+        console.error(e);
+      }
+    }
+
     restoreCostumeContent(args, util) {
       const costumeIndex = this.getCostumeInput(args.COSTUME, util.target);
       const costume = util.target.sprite.costumes[costumeIndex];