Don't disable depth writes when blending is enabled

apps/openmw/mwrender/activatoranimation.cpp

@@ -42,8 +42,7 @@ ActivatorAnimation::ActivatorAnimation(const MWWorld::Ptr &ptr)
                     while (passIt.hasMoreElements() && !transparent)
                     {
                         Ogre::Pass* pass = passIt.getNext();
-
-                        if (pass->getDepthWriteEnabled() == false)
+                        if(pass->getSourceBlendFactor() != Ogre::SBF_ONE || pass->getDestBlendFactor() != Ogre::SBF_ZERO)
                             transparent = true;
                     }
                 }

apps/openmw/mwrender/creatureanimation.cpp

@@ -43,8 +43,7 @@ CreatureAnimation::CreatureAnimation(const MWWorld::Ptr &ptr)
                     while (passIt.hasMoreElements() && !transparent)
                     {
                         Ogre::Pass* pass = passIt.getNext();
-
-                        if (pass->getDepthWriteEnabled() == false)
+                        if(pass->getSourceBlendFactor() != Ogre::SBF_ONE || pass->getDestBlendFactor() != Ogre::SBF_ZERO)
                             transparent = true;
                     }
                 }

apps/openmw/mwrender/npcanimation.cpp

@@ -118,7 +118,7 @@ NpcAnimation::NpcAnimation(const MWWorld::Ptr& ptr, Ogre::SceneNode* node, MWWor
                 while (passIt.hasMoreElements())
                 {
                     Ogre::Pass* pass = passIt.getNext();
-                    if (pass->getDepthWriteEnabled() == false)
+                    if(pass->getSourceBlendFactor() != Ogre::SBF_ONE || pass->getDestBlendFactor() != Ogre::SBF_ZERO)
                         transparent = true;
                 }
             }

apps/openmw/mwrender/objects.cpp

@@ -148,8 +148,7 @@ void Objects::insertMesh (const MWWorld::Ptr& ptr, const std::string& mesh, bool
                 while (passIt.hasMoreElements())
                 {
                     Ogre::Pass* pass = passIt.getNext();
-
-                    if (pass->getDepthWriteEnabled() == false)
+                    if(pass->getSourceBlendFactor() != Ogre::SBF_ONE || pass->getDestBlendFactor() != Ogre::SBF_ZERO)
                         transparent = true;
                 }
             }

components/nifogre/ogre_nif_loader.cpp

@@ -716,8 +716,6 @@ static Ogre::String getMaterial(const Nif::NiTriShape *shape, const Ogre::String
         blend_mode += getBlendFactor((alphaFlags>>1)&0xf);
         blend_mode += " ";
         blend_mode += getBlendFactor((alphaFlags>>5)&0xf);
-
-        instance->setProperty("depth_write", sh::makeProperty(new sh::StringValue("off")));
         instance->setProperty("scene_blend", sh::makeProperty(new sh::StringValue(blend_mode)));
     }
     else