Add a dont_override_filter description for textures that should be left alone

components/resource/scenemanager.cpp

@@ -189,6 +189,13 @@ namespace Resource
             osg::Texture* tex = attr->asTexture();
             if (tex)
             {
+                if (tex->getUserDataContainer())
+                {
+                    const std::vector<std::string>& descriptions = tex->getUserDataContainer()->getDescriptions();
+                    if (std::find(descriptions.begin(), descriptions.end(), "dont_override_filter") != descriptions.end())
+                        return;
+                }
+
                 tex->setFilter(osg::Texture::MIN_FILTER, mMinFilter);
                 tex->setFilter(osg::Texture::MAG_FILTER, mMagFilter);
                 tex->setMaxAnisotropy(mMaxAnisotropy);

components/terrain/terraingrid.cpp

@@ -151,6 +151,7 @@ osg::ref_ptr<osg::Node> TerrainGrid::buildTerrain (osg::Group* parent, float chu
             texture->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR);
             texture->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR);
             texture->setResizeNonPowerOfTwoHint(false);
+            texture->getOrCreateUserDataContainer()->addDescription("dont_override_filter");
             blendmapTextures.push_back(texture);
 
             textureCompileDummy->getOrCreateStateSet()->setTextureAttributeAndModes(dummyTextureCounter++, blendmapTextures.back());