Initial

resources/app/client/pixi/layers/effects/darkness-effects.js

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+/**
+ * A layer of background alteration effects which change the appearance of the primary group render texture.
+ * @category - Canvas
+ */
+class CanvasDarknessEffects extends CanvasLayer {
+  constructor() {
+    super();
+    this.sortableChildren = true;
+  }
+
+  /* -------------------------------------------- */
+
+  /**
+   * Clear coloration effects container
+   */
+  clear() {
+    this.removeChildren();
+  }
+
+  /* -------------------------------------------- */
+
+  /** @override */
+  async _draw(options) {
+    this.filter = VoidFilter.create();
+    this.filter.blendMode = PIXI.BLEND_MODES.NORMAL;
+    this.filterArea = canvas.app.renderer.screen;
+    this.filters = [this.filter];
+  }
+}