diff --git a/include/osgUtil/RenderStage b/include/osgUtil/RenderStage
index 15c0d2fad..199c9b47e 100644
--- a/include/osgUtil/RenderStage
+++ b/include/osgUtil/RenderStage
@@ -226,6 +226,8 @@ class OSGUTIL_EXPORT RenderStage : public RenderBin
         
         GLenum                              _drawBuffer;
         GLenum                              _readBuffer;
+        // Buffers passed to glDrawBuffers when using multiple render targets.
+        std::vector<GLenum>                 _drawBuffers;
         GLbitfield                          _clearMask;
         osg::ref_ptr<osg::ColorMask>        _colorMask;
         osg::Vec4                           _clearColor;
diff --git a/src/osgUtil/RenderStage.cpp b/src/osgUtil/RenderStage.cpp
index ef03de210..79e214785 100644
--- a/src/osgUtil/RenderStage.cpp
+++ b/src/osgUtil/RenderStage.cpp
@@ -92,6 +92,7 @@ RenderStage::RenderStage(const RenderStage& rhs,const osg::CopyOp& copyop):
         _viewport(rhs._viewport),
         _drawBuffer(rhs._drawBuffer),
         _readBuffer(rhs._readBuffer),
+        _drawBuffers(rhs._drawBuffers),
         _clearMask(rhs._clearMask),
         _colorMask(rhs._colorMask),
         _clearColor(rhs._clearColor),
@@ -240,7 +241,7 @@ void RenderStage::runCameraSetUp(osg::RenderInfo& renderInfo)
     // osg::notify(osg::NOTICE)<<"RenderStage::runCameraSetUp viewport "<<_viewport->x()<<" "<<_viewport->y()<<" "<<_viewport->width()<<" "<<_viewport->height()<<std::endl;
     // osg::notify(osg::NOTICE)<<"RenderStage::runCameraSetUp computed "<<width<<" "<<height<<" "<<depth<<std::endl;
 
-    // attach an images that need to be copied after the stage is drawn.
+    // attach images that need to be copied after the stage is drawn.
     for(itr = bufferAttachments.begin();
         itr != bufferAttachments.end();
         ++itr)
@@ -331,6 +332,8 @@ void RenderStage::runCameraSetUp(osg::RenderInfo& renderInfo)
             bool colorAttached = false;
             bool depthAttached = false;
             bool stencilAttached = false;
+            _drawBuffers.clear(); // MRT buffers
+            
             for(osg::Camera::BufferAttachmentMap::iterator itr = bufferAttachments.begin();
                 itr != bufferAttachments.end();
                 ++itr)
@@ -363,9 +366,11 @@ void RenderStage::runCameraSetUp(osg::RenderInfo& renderInfo)
                     {
                         fbo->setAttachment(GL_COLOR_ATTACHMENT0_EXT+(buffer-osg::Camera::COLOR_BUFFER0), osg::FrameBufferAttachment(attachment));
                         colorAttached = true;
+
+                        // append to MRT buffer list
+                        _drawBuffers.push_back(GL_COLOR_ATTACHMENT0_EXT+(buffer-osg::Camera::COLOR_BUFFER0));
                         break;
                     }
-
                 }
             }
 
@@ -390,6 +395,7 @@ void RenderStage::runCameraSetUp(osg::RenderInfo& renderInfo)
                 fbo_supported = false;
                 fbo_ext->glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
                 fbo = 0;
+                _drawBuffers.clear();
                 
                 // clean up.
                 double availableTime = 100.0f;
@@ -403,11 +409,9 @@ void RenderStage::runCameraSetUp(osg::RenderInfo& renderInfo)
             {
                 setDrawBuffer(GL_NONE);
                 setReadBuffer(GL_NONE);
-                
+       
                 _fbo = fbo;
             }
-
-
         }
         
         if (!fbo_supported)
@@ -703,14 +707,19 @@ void RenderStage::drawInner(osg::RenderInfo& renderInfo,RenderLeaf*& previous, b
 {
     osg::State& state = *renderInfo.getState();
 
-    if (_drawBuffer != GL_NONE)
-    {    
-        glDrawBuffer(_drawBuffer);
-    }
+    bool using_multiple_render_targets = !(_drawBuffers.empty());
     
-    if (_readBuffer != GL_NONE)
+    if (!using_multiple_render_targets)
     {
-        glReadBuffer(_readBuffer);
+        if (_drawBuffer != GL_NONE)
+        {    
+            glDrawBuffer(_drawBuffer);
+        }
+
+        if (_readBuffer != GL_NONE)
+        {
+            glReadBuffer(_readBuffer);
+        }
     }
 
     osg::FBOExtensions* fbo_ext = _fbo.valid() ? osg::FBOExtensions::instance(state.getContextID(),true) : 0;
@@ -719,6 +728,15 @@ void RenderStage::drawInner(osg::RenderInfo& renderInfo,RenderLeaf*& previous, b
     if (fbo_supported)
     {
         _fbo->apply(state);
+    
+        if (using_multiple_render_targets)
+        {
+            GL2Extensions *gl2e = GL2Extensions::Get(state.getContextID(), true );
+            if (gl2e)
+            {
+                gl2e->glDrawBuffers(_drawBuffers.size(), &(_drawBuffers[0]));
+            }
+        }
     }
 
     // do the drawing itself.    
@@ -751,14 +769,24 @@ void RenderStage::drawInner(osg::RenderInfo& renderInfo,RenderLeaf*& previous, b
     {
          if (itr->second._image.valid())
          {
-
-             if (_readBuffer != GL_NONE)
+             if (using_multiple_render_targets)
              {
-                 glReadBuffer(_readBuffer);
+                 int attachment=itr->first;
+                 if (attachment==osg::Camera::DEPTH_BUFFER || attachment==osg::Camera::STENCIL_BUFFER) {
+                     // assume first buffer rendered to is the one we want
+                     glReadBuffer(_drawBuffers[0]);
+                 } else {
+                     glReadBuffer(GL_COLOR_ATTACHMENT0_EXT + (attachment - osg::Camera::COLOR_BUFFER0));
+                 }
+             } else {
+                 if (_readBuffer != GL_NONE)
+                 {
+                     glReadBuffer(_readBuffer);
+                 }
              }
 
              GLenum pixelFormat = itr->second._image->getPixelFormat();
-              if (pixelFormat==0) pixelFormat = _imageReadPixelFormat;
+             if (pixelFormat==0) pixelFormat = _imageReadPixelFormat;
              if (pixelFormat==0) pixelFormat = GL_RGB;
 
              GLenum dataType = itr->second._image->getDataType();