diff --git a/apps/openmw/mwrender/pingpongcanvas.cpp b/apps/openmw/mwrender/pingpongcanvas.cpp
index 9592a8bbba..157e325ee5 100644
--- a/apps/openmw/mwrender/pingpongcanvas.cpp
+++ b/apps/openmw/mwrender/pingpongcanvas.cpp
@@ -103,7 +103,15 @@ namespace MWRender
         if (filtered.empty() || !bufferData.postprocessing)
         {
             if (bufferData.postprocessing)
-                Log(Debug::Error) << "Critical error, postprocess shaders failed to compile. Using default shader.";
+            {
+                if (!mLoggedLastError)
+                {
+                    Log(Debug::Error) << "Critical error, postprocess shaders failed to compile. Using default shader.";
+                    mLoggedLastError = true;
+                }
+            }
+            else
+                mLoggedLastError = false;
 
             mFallbackStateSet->setTextureAttributeAndModes(0, bufferData.sceneTex);
 
diff --git a/apps/openmw/mwrender/pingpongcanvas.hpp b/apps/openmw/mwrender/pingpongcanvas.hpp
index bb39f9bcf3..9a3906a006 100644
--- a/apps/openmw/mwrender/pingpongcanvas.hpp
+++ b/apps/openmw/mwrender/pingpongcanvas.hpp
@@ -82,6 +82,8 @@ namespace MWRender
 
         mutable std::optional<fx::DispatchArray> mQueuedDispatchArray;
         mutable size_t mQueuedDispatchFrameId;
+
+        mutable bool mLoggedLastError = false;
     };
 }
 
diff --git a/apps/openmw/mwrender/postprocessor.cpp b/apps/openmw/mwrender/postprocessor.cpp
index 78016ceceb..61468df7da 100644
--- a/apps/openmw/mwrender/postprocessor.cpp
+++ b/apps/openmw/mwrender/postprocessor.cpp
@@ -378,7 +378,7 @@ namespace MWRender
             const auto lastWriteTime = std::filesystem::last_write_time(mTechniqueFileMap[technique->getName()]);
             const bool isDirty = technique->setLastModificationTime(lastWriteTime);
 
-            if (technique->isValid() && !isDirty)
+            if (!isDirty)
                 continue;
 
             if (technique->compile())
@@ -671,6 +671,9 @@ namespace MWRender
 
     bool PostProcessor::disableTechnique(std::shared_ptr<fx::Technique> technique, bool dirty)
     {
+        if (Misc::StringUtils::ciEqual(technique->getName(), "main"))
+            return false;
+
         auto it = std::find(mTechniques.begin(), mTechniques.end(), technique);
         if (it == std::end(mTechniques))
             return false;
diff --git a/components/fx/technique.cpp b/components/fx/technique.cpp
index 8090a27b76..019744e70d 100644
--- a/components/fx/technique.cpp
+++ b/components/fx/technique.cpp
@@ -510,6 +510,7 @@ namespace fx
         if (proxy.internal_format.has_value())
             sampler->setSourceFormat(proxy.internal_format.value());
         sampler->setName(std::string{mBlockName});
+        sampler->setResizeNonPowerOfTwoHint(false);
 
         mTextures.emplace_back(sampler);