SkyStereoStatesetUpdater was incorrectly always using reverseZ matrices.

apps/openmw/mwrender/skyutil.cpp

@@ -629,7 +629,7 @@ namespace MWRender
 
                 for (int view : {0, 1})
                 {
-                    auto projectionMatrix = sm.computeEyeProjection(view, true);
+                    auto projectionMatrix = sm.computeEyeProjection(view, SceneUtil::AutoDepth::isReversed());
                     auto viewOffsetMatrix = sm.computeEyeViewOffset(view);
                     for (int col : {0, 1, 2})
                         viewOffsetMatrix(3, col) = 0;
@@ -644,14 +644,14 @@ namespace MWRender
         {
             auto& sm = Stereo::Manager::instance();
             auto* projectionMatrixUniform = stateset->getUniform("projectionMatrix");
-            auto projectionMatrix = sm.computeEyeProjection(0, true);
+            auto projectionMatrix = sm.computeEyeProjection(0, SceneUtil::AutoDepth::isReversed());
             projectionMatrixUniform->set(projectionMatrix);
         }
         void applyRight(osg::StateSet* stateset, osgUtil::CullVisitor* /*cv*/) override
         {
             auto& sm = Stereo::Manager::instance();
             auto* projectionMatrixUniform = stateset->getUniform("projectionMatrix");
-            auto projectionMatrix = sm.computeEyeProjection(1, true);
+            auto projectionMatrix = sm.computeEyeProjection(1, SceneUtil::AutoDepth::isReversed());
             projectionMatrixUniform->set(projectionMatrix);
         }