Index: src/org/openstreetmap/josm/data/osm/visitor/paint/StyledMapRenderer.java
===================================================================
--- src/org/openstreetmap/josm/data/osm/visitor/paint/StyledMapRenderer.java	(revision 14575)
+++ src/org/openstreetmap/josm/data/osm/visitor/paint/StyledMapRenderer.java	(working copy)
@@ -518,6 +518,8 @@
                 p.appendFromEastNorth(pd.get());
                 p.setWindingRule(Path2D.WIND_EVEN_ODD);
                 Path2D.Double pfClip = null;
+                if (pd.getNodes().size() > 10000)
+                    extent = null;
                 if (extent != null) {
                     if (!usePartialFill(pd.getAreaAndPerimeter(null), extent, extentThreshold)) {
                         extent = null;