fix on drawing compartments for semantic zoom

converter-graphics/src/main/java/lcsb/mapviewer/converter/graphics/AbstractImageGenerator.java

@@ -736,8 +736,7 @@ public abstract class AbstractImageGenerator {
 	protected void drawCompartment(final Compartment compartment, final boolean nested, List<ColorSchema> visibleLayouts, Params params)
 			throws DrawingException {
 		// If 'compartment' has not the big enough visibility level then should not
-		// be
-		// visible.
+		// be visible.
 
 		if (compartment.getVisibilityLevel() > level && params.nested) {
 			return;
@@ -750,7 +749,7 @@ public abstract class AbstractImageGenerator {
 		 */
 
 		boolean fill = true;
-		if (compartment.getTransparencyLevel() <= level) {
+		if (compartment.getTransparencyLevel() <= level || !nested) {
 			fill = false;
 		}