+ if (_clip_distance!=0.0)
+ {
+ osg::ref_ptr<osg::ClipNode> clipNode = new osg::ClipNode;
+ clipNode->addClipPlane( new osg::ClipPlane( 0 ) );
+ clipNode->getClipPlane(0)->setClipPlane( 0.0, 0.0, -1.0, -_clip_distance );
+ clipNode->setReferenceFrame(osg::ClipNode::ABSOLUTE_RF);
+ clipNode->addChild(_precipitationEffect.get());
+
+ group->addChild(clipNode.get());
+ }
+ else
+ {
+ group->addChild(_precipitationEffect.get());
+ }
+
+ group->setNodeMask( ~(simgear::CASTSHADOW_BIT | simgear::MODELLIGHT_BIT) );