diff --git a/ArchitectureColoredPainting/src/Editor/GraphicElement.cpp b/ArchitectureColoredPainting/src/Editor/GraphicElement.cpp
index bcee199..ceef5cf 100644
--- a/ArchitectureColoredPainting/src/Editor/GraphicElement.cpp
+++ b/ArchitectureColoredPainting/src/Editor/GraphicElement.cpp
@@ -106,13 +106,9 @@ void SimpleElement::paint(QPainter* painter, QTransform transform, const LayerSt
 	}
 	else
 	{
-		double angle = atan(transform.m12() / transform.m11());
-		double maxScale;
-		if (fabs(cos(angle))>1e-5)
-			maxScale = std::max(fabs(transform.m11() / cos(angle)), fabs(transform.m22() / cos(angle)));
-		else
-			maxScale = std::max(fabs(transform.m12() / sin(angle)), fabs(transform.m21() / sin(angle)));
-		double pixelRatio = maxScale * QGuiApplication::primaryScreen()->devicePixelRatio();
+		float sx = sqrt(transform.m11() * transform.m11() + transform.m12() * transform.m12());
+		float sy = sqrt(transform.m21() * transform.m21() + transform.m22() * transform.m22());
+		double pixelRatio = std::max(sx, sy) * QGuiApplication::primaryScreen()->devicePixelRatio() * 2;
 		//double pixelRatio = 5;
 		if (painterPath == painterPathPrev && styles.getHash() == stylesHashValue && pixelRatioPrev >= pixelRatio && !forceRefresh)
 		{