diff --git a/TODO-zh.md b/TODO-zh.md
index 5128c8356..dad0986ff 100644
--- a/TODO-zh.md
+++ b/TODO-zh.md
@@ -45,12 +45,18 @@
 8) Project Extent / Fielding 行为待确认
 - 现状：`OlivePluginInstance::getProjectExtent()` 有 “TODO” 注释。
 - 为什么需要：OFX 插件会根据项目尺寸、扫描线场信息做渲染决策。
-- 可能改动：明确工程是否支持不同 extent/fielding，确保返回值与项目设置一致。
+- 已完成：
+  - `getProjectExtent()` 明确返回项目宽高，不再留 TODO。
+  - `getDefaultOutputFielding()` 根据 `VideoParams::interlacing()` 映射为 OFX fielding。
+  - 渲染时 `renderAction()` 的 field 参数根据项目是否交错决定（progressive 用 `None`，interlaced 用 `Both`）。
 
 9) OpenGL Render Suite 支持
 - 现状：`OliveClipInstance::loadTexture()` 返回 null，OpenGL 渲染路径未实现。
 - 为什么需要：有些 OFX 插件只支持 OpenGL 渲染，不支持 CPU 渲染。
-- 可能改动：要么实现 OpenGL texture 的加载与生命周期，要么在 host capability 中明确禁用 OpenGL render。
+- 已完成：
+  - Host 端声明 `kOfxImageEffectPropOpenGLRenderSupported = true`。
+  - `OliveClipInstance::loadTexture()` 返回真实的 OpenGL 纹理句柄。
+  - 渲染前设置 Output Clip 的目标纹理，输入纹理走 OpenGL 纹理路径。
 
 ---
 
diff --git a/app/pluginSupport/OliveClip.cpp b/app/pluginSupport/OliveClip.cpp
index 7b65c3ff4..d4d7cf19a 100644
--- a/app/pluginSupport/OliveClip.cpp
+++ b/app/pluginSupport/OliveClip.cpp
@@ -32,6 +32,9 @@
 #include <cmath>
 #include <cstring>
 #include <memory>
+#ifdef OFX_SUPPORTS_OPENGLRENDER
+#include <QOpenGLFunctions>
+#endif
 
 extern "C" {
 #include <libswscale/swscale.h>
@@ -203,12 +206,15 @@ void olive::plugin::OliveClipInstance::setInputTexture(TexturePtr texture, OfxTi
 	if (!texture) {
 		return;
 	}
+	this->params_ = texture->params();
+#ifdef OFX_SUPPORTS_OPENGLRENDER
+	input_textures_.insert(time, texture);
+#endif
+
 	AVFramePtr frame = texture->frame();
 	if (!frame || !frame->data[0]) {
 		return;
 	}
-
-	this->params_=texture->params();
 	AVPixelFormat expected_fmt =
 		FFmpegUtils::GetFFmpegPixelFormat(params_.format(),
 										  params_.channel_count());
@@ -282,3 +288,70 @@ void olive::plugin::OliveClipInstance::setInputTexture(TexturePtr texture, OfxTi
 					copy_bytes);
 	}
 }
+
+void olive::plugin::OliveClipInstance::setOutputTexture(Texture *texture,
+														OfxTime time)
+{
+#ifdef OFX_SUPPORTS_OPENGLRENDER
+	if (!texture) {
+		return;
+	}
+	output_textures_.insert(time, texture);
+#else
+	(void)texture;
+	(void)time;
+#endif
+}
+
+#ifdef OFX_SUPPORTS_OPENGLRENDER
+OFX::Host::ImageEffect::Texture *
+olive::plugin::OliveClipInstance::loadTexture(OfxTime time, const char *format,
+											  const OfxRectD *optionalBounds)
+{
+	(void)format;
+
+	Texture *gl_texture = nullptr;
+	if (isOutput()) {
+		gl_texture = output_textures_.value(time, nullptr);
+	} else {
+		TexturePtr input = input_textures_.value(time);
+		gl_texture = input ? input.get() : nullptr;
+	}
+
+	if (!gl_texture || gl_texture->IsDummy() || !gl_texture->id().isValid()) {
+		return nullptr;
+	}
+
+	OfxRectD rod_d = getRegionOfDefinition(time);
+	OfxRectI rod = { static_cast<int>(std::floor(rod_d.x1)),
+					 static_cast<int>(std::floor(rod_d.y1)),
+					 static_cast<int>(std::ceil(rod_d.x2)),
+					 static_cast<int>(std::ceil(rod_d.y2)) };
+	OfxRectI bounds = rod;
+	if (optionalBounds) {
+		bounds.x1 = static_cast<int>(std::floor(optionalBounds->x1));
+		bounds.y1 = static_cast<int>(std::floor(optionalBounds->y1));
+		bounds.x2 = static_cast<int>(std::ceil(optionalBounds->x2));
+		bounds.y2 = static_cast<int>(std::ceil(optionalBounds->y2));
+	}
+	bounds.x1 = std::max(bounds.x1, rod.x1);
+	bounds.y1 = std::max(bounds.y1, rod.y1);
+	bounds.x2 = std::min(bounds.x2, rod.x2);
+	bounds.y2 = std::min(bounds.y2, rod.y2);
+
+	const int bytes_per_row =
+		params_.width() * params_.channel_count() * params_.format().byte_count();
+	const std::string &field = getFieldOrder();
+	const std::string unique_id = std::to_string(
+		reinterpret_cast<uintptr_t>(gl_texture)) + "_" +
+		std::to_string(static_cast<long long>(time));
+
+	const int texture_id = gl_texture->id().value<GLuint>();
+	OFX::Host::ImageEffect::Texture *texture =
+		new OFX::Host::ImageEffect::Texture(
+			*this, 1.0, 1.0, texture_id, GL_TEXTURE_2D, bounds, rod,
+			bytes_per_row, field, unique_id);
+	texture->addReference();
+	return texture;
+}
+#endif
diff --git a/app/pluginSupport/OliveClip.h b/app/pluginSupport/OliveClip.h
index 2cb56962b..575d0c2d0 100644
--- a/app/pluginSupport/OliveClip.h
+++ b/app/pluginSupport/OliveClip.h
@@ -70,10 +70,13 @@ public:
 		params_ = params;
 	}
 #   ifdef OFX_SUPPORTS_OPENGLRENDER
-	OFX::Host::ImageEffect::Texture* loadTexture(OfxTime time, const char *format, const OfxRectD *optionalBounds) { return NULL; };
+	OFX::Host::ImageEffect::Texture* loadTexture(OfxTime time,
+												 const char *format,
+												 const OfxRectD *optionalBounds) override;
 #   endif
 
 	void setInputTexture(TexturePtr texture, OfxTime time);
+	void setOutputTexture(Texture *texture, OfxTime time);
 
 private:
 	VideoParams params_;
@@ -84,6 +87,10 @@ private:
 
 	std::string name_;
 	QMap<OfxTime,std::shared_ptr<Image>> images_;
+#ifdef OFX_SUPPORTS_OPENGLRENDER
+	QMap<OfxTime, TexturePtr> input_textures_;
+	QMap<OfxTime, Texture *> output_textures_;
+#endif
 };
 }
 }
diff --git a/app/pluginSupport/OliveHost.cpp b/app/pluginSupport/OliveHost.cpp
index e8f5d6a46..40268d223 100644
--- a/app/pluginSupport/OliveHost.cpp
+++ b/app/pluginSupport/OliveHost.cpp
@@ -77,6 +77,10 @@ ImageEffect::Descriptor *
 OliveHost::makeDescriptor(ImageEffect::ImageEffectPlugin* plugin)
 {
 	ImageEffect::Descriptor* desc = new ImageEffect::Descriptor(plugin);
+#ifdef OFX_SUPPORTS_OPENGLRENDER
+	desc->getProps().setStringProperty(kOfxImageEffectPropOpenGLRenderSupported,
+									   "true");
+#endif
 	descriptors_.append(desc);
 	return desc;
 }
@@ -85,6 +89,10 @@ OliveHost::makeDescriptor(const ImageEffect::Descriptor &rootContext,
 							ImageEffect::ImageEffectPlugin *plugin)
 {
 	ImageEffect::Descriptor* desc =  new ImageEffect::Descriptor(rootContext,plugin);
+#ifdef OFX_SUPPORTS_OPENGLRENDER
+	desc->getProps().setStringProperty(kOfxImageEffectPropOpenGLRenderSupported,
+									   "true");
+#endif
 	descriptors_.append(desc);
 	return desc;
 }
@@ -93,6 +101,10 @@ OliveHost::makeDescriptor(const std::string &bundlePath,
 							ImageEffect::ImageEffectPlugin *plugin)
 {
 	ImageEffect::Descriptor* desc =  new ImageEffect::Descriptor(bundlePath, plugin);
+#ifdef OFX_SUPPORTS_OPENGLRENDER
+	desc->getProps().setStringProperty(kOfxImageEffectPropOpenGLRenderSupported,
+									   "true");
+#endif
 	descriptors_.append(desc);
 	return desc;
 }
diff --git a/app/pluginSupport/OlivePluginInstance.cpp b/app/pluginSupport/OlivePluginInstance.cpp
index 9a95419c1..7513425fe 100644
--- a/app/pluginSupport/OlivePluginInstance.cpp
+++ b/app/pluginSupport/OlivePluginInstance.cpp
@@ -18,6 +18,7 @@
 #include "OlivePluginInstance.h"
 
 #include "OliveClip.h"
+#include "ofxGPURender.h"
 #include "ofxCore.h"
 #include "ofxMessage.h"
 #include "common/Current.h"
@@ -42,6 +43,19 @@ namespace olive
 namespace plugin
 {
 namespace {
+const std::string &FieldOrderForParams(const VideoParams &params)
+{
+	switch (params.interlacing()) {
+	case VideoParams::kInterlaceNone:
+		return kOfxImageFieldNone;
+	case VideoParams::kInterlacedTopFirst:
+		return kOfxImageFieldUpper;
+	case VideoParams::kInterlacedBottomFirst:
+		return kOfxImageFieldLower;
+	}
+	return kOfxImageFieldNone;
+}
+
 class DeferredRedoCommand : public UndoCommand {
 public:
 	explicit DeferredRedoCommand(UndoCommand *inner)
@@ -107,6 +121,11 @@ ViewerOutput *GetActiveViewerOutput()
 }
 } // namespace
 
+const std::string &OlivePluginInstance::getDefaultOutputFielding() const
+{
+	return FieldOrderForParams(params_);
+}
+
 OfxStatus OlivePluginInstance::vmessage(const char *type, const char *id,
 								  const char *format, va_list args)
 {
@@ -196,7 +215,6 @@ void OlivePluginInstance::getProjectExtent(double &xSize, double &ySize) const
 {
 	xSize =params_.width();
 	ySize =params_.height();
-	// TODO: Ensure this project does not support this.
 }
 double OlivePluginInstance::getProjectPixelAspectRatio() const
 {
@@ -392,6 +410,22 @@ bool OlivePluginInstance::progressUpdate(double t)
 	return !progress_cancelled_;
 }
 
+OfxStatus OlivePluginInstance::contextAttachedAction()
+{
+	if (!open_gl_enabled_) {
+		return kOfxStatReplyDefault;
+	}
+	return kOfxStatOK;
+}
+
+OfxStatus OlivePluginInstance::contextDetachedAction()
+{
+	if (!open_gl_enabled_) {
+		return kOfxStatReplyDefault;
+	}
+	return kOfxStatOK;
+}
+
 double OlivePluginInstance::timeLineGetTime()
 {
 	if (ViewerOutput *viewer = GetActiveViewerOutput()) {
@@ -420,6 +454,17 @@ void OlivePluginInstance::timeLineGetBounds(double &t1, double &t2)
 	t2 = 0.0;
 }
 
+void OlivePluginInstance::setCustomInArgs(const std::string &action,
+										  OFX::Host::Property::Set &inArgs)
+{
+	if (action == kOfxImageEffectActionRender ||
+		action == kOfxImageEffectActionBeginSequenceRender ||
+		action == kOfxImageEffectActionEndSequenceRender) {
+		inArgs.setIntProperty(kOfxImageEffectPropOpenGLEnabled,
+							  open_gl_enabled_ ? 1 : 0);
+	}
+}
+
 OFX::Host::ImageEffect::ClipInstance *OlivePluginInstance::newClipInstance(
 	OFX::Host::ImageEffect::Instance *plugin,
 	OFX::Host::ImageEffect::ClipDescriptor *descriptor,
diff --git a/app/pluginSupport/OlivePluginInstance.h b/app/pluginSupport/OlivePluginInstance.h
index f1e12893d..908638eed 100644
--- a/app/pluginSupport/OlivePluginInstance.h
+++ b/app/pluginSupport/OlivePluginInstance.h
@@ -67,9 +67,7 @@ public:
 	}
 	explicit OlivePluginInstance(Instance & instance):Instance(instance){};
 	~OlivePluginInstance() override = default;
-	const std::string &getDefaultOutputFielding() const{
-		return kOfxImageFieldNone;
-	};
+	const std::string &getDefaultOutputFielding() const override;
 
 	void setVideoParam(VideoParams params)
 	{
@@ -79,6 +77,10 @@ public:
 	{
 		node_ = node;
 	}
+	void setOpenGLEnabled(bool enabled)
+	{
+		open_gl_enabled_ = enabled;
+	}
 	OFX::Host::ImageEffect::ClipInstance *newClipInstance(
 		OFX::Host::ImageEffect::Instance *plugin,
 		OFX::Host::ImageEffect::ClipDescriptor *descriptor,
@@ -165,6 +167,11 @@ public:
 	/// false if you should abandon processing, true to continue
 	virtual bool progressUpdate(double t) override;
 
+#ifdef OFX_SUPPORTS_OPENGLRENDER
+	virtual OfxStatus contextAttachedAction() override;
+	virtual OfxStatus contextDetachedAction() override;
+#endif
+
 	////////////////////////////////////////////////////////////////////////////////
 	////////////////////////////////////////////////////////////////////////////////
 	////////////////////////////////////////////////////////////////////////////////
@@ -182,6 +189,9 @@ public:
 	/// get the first and last times available on the effect's timeline
 	virtual void timeLineGetBounds(double &t1, double &t2);
 
+	void setCustomInArgs(const std::string &action,
+						 OFX::Host::Property::Set &inArgs) override;
+
 
 private:
 	QList<PersistentErrors> persistentErrors_;
@@ -195,6 +205,7 @@ private:
 	QPointer<ProgressDialog> progress_dialog_;
 	bool progress_cancelled_ = false;
 	bool progress_active_ = false;
+	bool open_gl_enabled_ = false;
 };
 }
 }
diff --git a/app/render/plugin/pluginrenderer.cpp b/app/render/plugin/pluginrenderer.cpp
index d4e464cd1..6f5bf8cdd 100644
--- a/app/render/plugin/pluginrenderer.cpp
+++ b/app/render/plugin/pluginrenderer.cpp
@@ -151,6 +151,94 @@ static AVPixelFormat GetDestinationAVPixelFormat(const olive::VideoParams &param
 	return pix_fmt;
 }
 
+static const char *GetRenderFieldForParams(const olive::VideoParams &params)
+{
+	switch (params.interlacing()) {
+	case olive::VideoParams::kInterlaceNone:
+		return kOfxImageFieldNone;
+	case olive::VideoParams::kInterlacedTopFirst:
+	case olive::VideoParams::kInterlacedBottomFirst:
+		return kOfxImageFieldBoth;
+	}
+	return kOfxImageFieldNone;
+}
+
+static olive::AVFramePtr ReadbackTextureToFrame(olive::Texture *texture,
+												const olive::VideoParams &params)
+{
+	if (!texture || texture->IsDummy()) {
+		return nullptr;
+	}
+
+	AVPixelFormat pix_fmt = GetDestinationAVPixelFormat(params);
+	if (pix_fmt == AV_PIX_FMT_NONE) {
+		return nullptr;
+	}
+
+	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
+	if (!desc) {
+		return nullptr;
+	}
+
+	if (!(desc->flags & AV_PIX_FMT_FLAG_PLANAR)) {
+		olive::AVFramePtr frame = olive::CreateAVFramePtr();
+		frame->format = pix_fmt;
+		frame->width = params.width();
+		frame->height = params.height();
+		if (av_frame_get_buffer(frame.get(), 0) < 0) {
+			return nullptr;
+		}
+
+		if (texture->renderer()) {
+			texture->renderer()->DownloadFromTexture(
+				texture->id(), params, frame->data[0], frame->linesize[0]);
+		}
+		return frame;
+	}
+
+	// Planar formats: read back as RGBA and convert.
+	olive::VideoParams rgba_params(
+		params.width(), params.height(), olive::core::PixelFormat::U8, 4,
+		params.pixel_aspect_ratio(), params.interlacing(), params.divider());
+
+	olive::AVFramePtr rgba_frame = olive::CreateAVFramePtr();
+	rgba_frame->format = AV_PIX_FMT_RGBA;
+	rgba_frame->width = params.width();
+	rgba_frame->height = params.height();
+	if (av_frame_get_buffer(rgba_frame.get(), 0) < 0) {
+		return nullptr;
+	}
+
+	if (texture->renderer()) {
+		texture->renderer()->DownloadFromTexture(
+			texture->id(), rgba_params, rgba_frame->data[0],
+			rgba_frame->linesize[0]);
+	}
+
+	olive::AVFramePtr dst = olive::CreateAVFramePtr();
+	dst->format = pix_fmt;
+	dst->width = params.width();
+	dst->height = params.height();
+	if (av_frame_get_buffer(dst.get(), 0) < 0) {
+		return rgba_frame;
+	}
+
+	SwsContext *sws_ctx = sws_getContext(
+		rgba_frame->width, rgba_frame->height,
+		static_cast<AVPixelFormat>(rgba_frame->format),
+		dst->width, dst->height, pix_fmt, SWS_POINT,
+		nullptr, nullptr, nullptr);
+	if (!sws_ctx) {
+		return rgba_frame;
+	}
+
+	sws_scale(sws_ctx, rgba_frame->data, rgba_frame->linesize, 0,
+			  rgba_frame->height, dst->data, dst->linesize);
+	sws_freeContext(sws_ctx);
+
+	return dst;
+}
+
 static olive::AVFramePtr ConvertFrameIfNeeded(olive::AVFramePtr src,
 											  const olive::VideoParams &dst_params)
 {
@@ -198,6 +286,16 @@ void olive::plugin::PluginRenderer::RenderPlugin(TexturePtr src, olive::plugin::
 					  bool clear_destination, bool interactive)
 {
 	auto instance=job.pluginInstance();
+	if (!instance) {
+		return;
+	}
+	auto *olive_instance =
+		dynamic_cast<olive::plugin::OlivePluginInstance *>(instance);
+	const bool use_opengl =
+		destination && destination->renderer() && destination->id().isValid();
+	if (olive_instance) {
+		olive_instance->setOpenGLEnabled(use_opengl);
+	}
 	OfxStatus stat;
 	stat = instance->createInstanceAction();
 	if(stat != kOfxStatOK && stat != kOfxStatReplyDefault) {
@@ -243,8 +341,17 @@ void olive::plugin::PluginRenderer::RenderPlugin(TexturePtr src, olive::plugin::
 		return;
 	}
 
+	if (use_opengl) {
+		instance->contextAttachedAction();
+		AttachOutputTexture(destination);
+	}
+
 	OliveClipInstance *clip=dynamic_cast<plugin::OliveClipInstance *>(instance->getClip("Output"));
 	if (!clip) {
+		if (use_opengl) {
+			DetachOutputTexture();
+			instance->contextDetachedAction();
+		}
 		instance->endRenderAction(0, numFramesToRender, 1.0, interactive, renderScale, true,interactive
 								  );
 		return;
@@ -255,6 +362,7 @@ void olive::plugin::PluginRenderer::RenderPlugin(TexturePtr src, olive::plugin::
 
 	clip->setParams(destination_params);
 	clip->setRegionOfDefinition(regionOfDefinition, frame);
+	clip->setOutputTexture(destination, frame);
 
 	const NodeValueRow &values = job.GetValues();
 	const auto &clips = instance->getDescriptor().getClips();
@@ -288,28 +396,65 @@ void olive::plugin::PluginRenderer::RenderPlugin(TexturePtr src, olive::plugin::
 	assert(stat == kOfxStatOK || stat == kOfxStatReplyDefault);
 
 	// render a frame
-	stat = instance->renderAction(0,kOfxImageFieldBoth,renderWindow, renderScale, true, interactive, interactive);
+	const char *render_field = GetRenderFieldForParams(destination_params);
+	stat = instance->renderAction(0, render_field, renderWindow, renderScale,
+								  true, interactive, interactive);
 	assert(stat == kOfxStatOK);
 
-	// get the output image buffer
-	std::shared_ptr<OFX::Host::ImageEffect::Image> output_image = clip->getOutputImage(frame);
-	if (!output_image) {
-		instance->endRenderAction(frame, numFramesToRender, 1.0, interactive, renderScale, true,interactive
-								  );
-		return;
+	// get the output image buffer (CPU path only)
+	std::shared_ptr<OFX::Host::ImageEffect::Image> output_image;
+	if (!use_opengl) {
+		output_image = clip->getOutputImage(frame);
+		if (!output_image) {
+			instance->endRenderAction(frame, numFramesToRender, 1.0, interactive,
+									  renderScale, true, interactive);
+			return;
+		}
+	} else {
+		if (!destination || !destination->id().isValid()) {
+			DetachOutputTexture();
+			instance->contextDetachedAction();
+			instance->endRenderAction(frame, numFramesToRender, 1.0, interactive,
+									  renderScale, true, interactive);
+			return;
+		}
 	}
 
-	AVFramePtr frame_ptr = create_avframe_from_ofx_image(*output_image);
-	if (!frame_ptr) {
-		instance->endRenderAction(0, numFramesToRender, 1.0, interactive, renderScale, true,interactive
-								  );
-		return;
+	if (!use_opengl) {
+		AVFramePtr frame_ptr = create_avframe_from_ofx_image(*output_image);
+		if (!frame_ptr) {
+			instance->endRenderAction(0, numFramesToRender, 1.0, interactive,
+									  renderScale, true, interactive);
+			return;
+		}
+		AVFramePtr converted = ConvertFrameIfNeeded(frame_ptr, destination_params);
+		destination->handleFrame(converted);
+	} else {
+		AVFramePtr frame_ptr =
+			ReadbackTextureToFrame(destination, destination_params);
+		DetachOutputTexture();
+		instance->contextDetachedAction();
+		if (frame_ptr) {
+			AVFramePtr converted =
+				ConvertFrameIfNeeded(frame_ptr, destination_params);
+			destination->handleFrame(converted);
+		}
 	}
 
-	AVFramePtr converted = ConvertFrameIfNeeded(frame_ptr, destination_params);
-	destination->handleFrame(converted);
-
 	instance->endRenderAction(0, numFramesToRender, 1.0, interactive, renderScale, true,interactive
 							  );
 
 }
+
+void olive::plugin::PluginRenderer::AttachOutputTexture(olive::Texture *texture)
+{
+	if (!texture) {
+		return;
+	}
+	AttachTextureAsDestination(texture->id());
+}
+
+void olive::plugin::PluginRenderer::DetachOutputTexture()
+{
+	DetachTextureAsDestination();
+}
diff --git a/app/render/plugin/pluginrenderer.h b/app/render/plugin/pluginrenderer.h
index 13e725598..721a64b07 100644
--- a/app/render/plugin/pluginrenderer.h
+++ b/app/render/plugin/pluginrenderer.h
@@ -42,6 +42,8 @@ class PluginRenderer : public olive::OpenGLRenderer{
 public:
 	PluginRenderer(QObject *parent=nullptr):OpenGLRenderer(parent){};
 	virtual ~PluginRenderer() override{};
+	void AttachOutputTexture(olive::Texture *texture);
+	void DetachOutputTexture();
 protected:
 	virtual void RenderPlugin(TexturePtr src, olive::plugin::PluginJob& job,
 					  olive::Texture *destination,