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Outline filter doesn't work for me!


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Hi I've been developing a "sticker mockup generator" using pixijs and here is the result so far:


(I used simple plane mesh to bend the png picture on the ground)

As you may know stickers come with a white (or transparent) stroke to get die cut.  something like this: 


but my problem is, OutlineFilter from npm packages "pixi-filters" or "@pixi/filter-outline" doesn't work at all and throws this error:

 cannot read property of undefined: (reading thickness)

I use Pixijs 6.0.2 and WEBGL 2 (without html canvas)


and here is my code which works just before adding the broken line :

import * as PIXI from "pixi.js";
import { OutlineFilter } from "@pixi/filter-outline";

let app = new PIXI.Application({
    backgroundColor: 0xdddddd,
const loader = PIXI.Loader.shared;
const container = new PIXI.Container();

loader.load((ldr, resources) => {
     const bg = new PIXI.Sprite(resources["images/react.png"].texture);
     bg.width = 300;
     bg.height = 300;
     const outlineFilter = new OutlineFilter(2, 0x002200, 2);
     bg.filters = [outlineFilter]; // broken line

I also have tried this filter in multiple situations but it didn't work..:(

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