From 54a3f76a2b623e9d1d9bf3f881852669ec5a865b Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Mon, 20 Jan 2014 15:54:48 +0000
Subject: [PATCH] Disable depth test for rendering of hull backface

---
 src/osgVolume/MultipassTechnique.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/osgVolume/MultipassTechnique.cpp b/src/osgVolume/MultipassTechnique.cpp
index 34513cbb3..fafa7ed89 100644
--- a/src/osgVolume/MultipassTechnique.cpp
+++ b/src/osgVolume/MultipassTechnique.cpp
@@ -306,6 +306,7 @@ void MultipassTechnique::init()
         stateset->addUniform(new osg::Uniform("frontFaceDepthTexture",2));
 
         stateset->setMode(GL_ALPHA_TEST,osg::StateAttribute::ON);
+        //stateset->setMode(GL_DEPTH_TEST,osg::StateAttribute::OFF);
 
         float alphaFuncValue = 0.1;
         if (cpv._isoProperty.valid())