removed overlay blending from lightning

src/client/js/rendering/lightningBuilder.js

@@ -78,8 +78,7 @@ define([
 						lightPatch.width = scaleMult * 3;
 						lightPatch.height = scaleMult * 3;
 
-						lightPatch.blendMode = PIXI.BLEND_MODES.OVERLAY;
-						lightPatch.pluginName = 'picture';
+						lightPatch.blendMode = PIXI.BLEND_MODES.ADD;
 
 						line.sprites.push(lightPatch);
 					}