Set PIXI.settings.RESOLUTION explicitly to 1

src/client/js/rendering/renderer.js

@@ -76,6 +76,7 @@ define([
 			PIXI.settings.GC_MODE = PIXI.GC_MODES.AUTO;
 			PIXI.settings.SCALE_MODE = PIXI.SCALE_MODES.NEAREST;
 			PIXI.settings.SPRITE_MAX_TEXTURES = Math.min(PIXI.settings.SPRITE_MAX_TEXTURES, 16);
+			PIXI.settings.RESOLUTION = 1;
 
 			events.on('onGetMap', this.onGetMap.bind(this));
 			events.on('onToggleFullscreen', this.toggleScreen.bind(this));