diff --git a/app/render/plugin/pluginrenderer.cpp b/app/render/plugin/pluginrenderer.cpp
index cb9b96bde..6bf41f166 100644
--- a/app/render/plugin/pluginrenderer.cpp
+++ b/app/render/plugin/pluginrenderer.cpp
@@ -1493,7 +1493,11 @@ void olive::plugin::PluginRenderer::RenderPlugin(TexturePtr src, olive::plugin::
 	// failure and would otherwise crash the render thread.
 	bool ok = false;
 	try {
-		ok = instance->getClipPreferences();
+		if (instance->areClipPrefsDirty()) {
+			ok = instance->getClipPreferences();
+		} else {
+			ok = true;
+		}
 	} catch (const OFX::Host::Property::Exception &e) {
 		qWarning().noquote() << "OFX getClipPreferences threw exception for plugin="
 							 << PluginIdForInstance(instance)
@@ -1658,6 +1662,10 @@ void olive::plugin::PluginRenderer::RenderPlugin(TexturePtr src, olive::plugin::
 		return;
 	}
 
+	// Inject current parameter values into the OFX instance before rendering.
+	// Parameters are bound to PluginNode inputs, so they change every frame.
+	ApplyParamOverrides(*instance, job.GetValues(), frame);
+
 	// render a frame
 	const char *render_field = GetRenderFieldForParams(output_params);
 	stat = instance->renderAction(frame, render_field, renderWindow, renderScale,
diff --git a/app/render/renderprocessor.cpp b/app/render/renderprocessor.cpp
index 28265f803..a628dd9dc 100644
--- a/app/render/renderprocessor.cpp
+++ b/app/render/renderprocessor.cpp
@@ -628,15 +628,24 @@ TexturePtr RenderProcessor::ProcessPluginJob(TexturePtr texture,
 		return destination;
 	}
 
-	if (!plugin_renderer_) {
-		auto *gl = dynamic_cast<OpenGLRenderer *>(render_ctx_);
-		if (!gl || !gl->context()) {
-			return destination;
+	plugin::PluginRenderer *plugin_renderer = nullptr;
+	{
+		thread_local static std::shared_ptr<plugin::PluginRenderer>
+			cached_plugin_renderer;
+		if (!cached_plugin_renderer) {
+			auto *gl = dynamic_cast<OpenGLRenderer *>(render_ctx_);
+			if (gl && gl->context()) {
+				cached_plugin_renderer =
+					std::make_shared<plugin::PluginRenderer>();
+				cached_plugin_renderer->Init(gl->context());
+				cached_plugin_renderer->PostInit();
+			}
 		}
+		plugin_renderer = cached_plugin_renderer.get();
+	}
 
-		plugin_renderer_ = std::make_unique<plugin::PluginRenderer>();
-		plugin_renderer_->Init(gl->context());
-		plugin_renderer_->PostInit();
+	if (!plugin_renderer) {
+		return destination;
 	}
 
 	NodeValueRow &values = plugin_job->GetValues();
@@ -687,7 +696,7 @@ TexturePtr RenderProcessor::ProcessPluginJob(TexturePtr texture,
 		}
 	}
 
-	plugin_renderer_->RenderPlugin(
+	plugin_renderer->RenderPlugin(
 		src,
 		*plugin_job,
 		destination,