diff --git a/src/rendering/gl/renderer/gl_renderer.h b/src/rendering/gl/renderer/gl_renderer.h
index 3dde0195c..84448bfc3 100644
--- a/src/rendering/gl/renderer/gl_renderer.h
+++ b/src/rendering/gl/renderer/gl_renderer.h
@@ -102,7 +102,6 @@ public:
 
 private:
 
-	void DrawScene(HWDrawInfo *di, int drawmode);
 	bool QuadStereoCheckInitialRenderContextState();
 	void PresentAnaglyph(bool r, bool g, bool b);
 	void PresentSideBySide();
diff --git a/src/rendering/gl/renderer/gl_scene.cpp b/src/rendering/gl/renderer/gl_scene.cpp
index a1c7a9f7a..4f99f2e2a 100644
--- a/src/rendering/gl/renderer/gl_scene.cpp
+++ b/src/rendering/gl/renderer/gl_scene.cpp
@@ -65,7 +65,6 @@
 //
 //==========================================================================
 CVAR(Bool, gl_texture, true, 0)
-CVAR(Bool, gl_no_skyclear, false, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
 CVAR(Float, gl_mask_threshold, 0.5f,CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
 CVAR(Float, gl_mask_sprite_threshold, 0.5f,CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
 
@@ -78,72 +77,6 @@ EXTERN_CVAR (Bool, r_drawvoxels)
 namespace OpenGLRenderer
 {
 
-//-----------------------------------------------------------------------------
-//
-// gl_drawscene - this function renders the scene from the current
-// viewpoint, including mirrors and skyboxes and other portals
-// It is assumed that the HWPortal::EndFrame returns with the 
-// stencil, z-buffer and the projection matrix intact!
-//
-//-----------------------------------------------------------------------------
-
-void FGLRenderer::DrawScene(HWDrawInfo *di, int drawmode)
-{
-	static int recursion=0;
-	static int ssao_portals_available = 0;
-	const auto &vp = di->Viewpoint;
-
-	bool applySSAO = false;
-	if (drawmode == DM_MAINVIEW)
-	{
-		ssao_portals_available = gl_ssao_portals;
-		applySSAO = true;
-	}
-	else if (drawmode == DM_OFFSCREEN)
-	{
-		ssao_portals_available = 0;
-	}
-	else if (drawmode == DM_PORTAL && ssao_portals_available > 0)
-	{
-		applySSAO = true;
-		ssao_portals_available--;
-	}
-
-	if (vp.camera != nullptr)
-	{
-		ActorRenderFlags savedflags = vp.camera->renderflags;
-		di->CreateScene(drawmode == DM_MAINVIEW);
-		vp.camera->renderflags = savedflags;
-	}
-	else
-	{
-		di->CreateScene(false);
-	}
-
-	glDepthMask(true);
-	if (!gl_no_skyclear) screen->mPortalState->RenderFirstSkyPortal(recursion, di, gl_RenderState);
-
-	di->RenderScene(gl_RenderState);
-
-	if (applySSAO && gl_RenderState.GetPassType() == GBUFFER_PASS)
-	{
-		gl_RenderState.EnableDrawBuffers(1);
-		GLRenderer->AmbientOccludeScene(di->VPUniforms.mProjectionMatrix.get()[5]);
-		glViewport(screen->mSceneViewport.left, screen->mSceneViewport.top, screen->mSceneViewport.width, screen->mSceneViewport.height);
-		GLRenderer->mBuffers->BindSceneFB(true);
-		gl_RenderState.EnableDrawBuffers(gl_RenderState.GetPassDrawBufferCount());
-		gl_RenderState.Apply();
-		screen->mViewpoints->Bind(gl_RenderState, di->vpIndex);
-	}
-
-	// Handle all portals after rendering the opaque objects but before
-	// doing all translucent stuff
-	recursion++;
-	screen->mPortalState->EndFrame(di, gl_RenderState);
-	recursion--;
-	di->RenderTranslucent(gl_RenderState);
-}
-
 //-----------------------------------------------------------------------------
 //
 // Renders one viewpoint in a scene
@@ -195,10 +128,7 @@ sector_t * FGLRenderer::RenderViewpoint (FRenderViewpoint &mainvp, AActor * came
 		vp.Pos += eye.GetViewShift(vp.HWAngles.Yaw.Degrees);
 		di->SetupView(gl_RenderState, vp.Pos.X, vp.Pos.Y, vp.Pos.Z, false, false);
 
-		// std::function until this can be done better in a cross-API fashion.
-		di->ProcessScene(toscreen, [&](HWDrawInfo *di, int mode) {
-			DrawScene(di, mode);
-		});
+		di->ProcessScene(toscreen);
 
 		if (mainview)
 		{
diff --git a/src/rendering/gl/system/gl_framebuffer.cpp b/src/rendering/gl/system/gl_framebuffer.cpp
index 7d99c3751..d85a4b351 100644
--- a/src/rendering/gl/system/gl_framebuffer.cpp
+++ b/src/rendering/gl/system/gl_framebuffer.cpp
@@ -519,6 +519,16 @@ FRenderState* OpenGLFrameBuffer::RenderState()
 	return &gl_RenderState;
 }
 
+void OpenGLFrameBuffer::AmbientOccludeScene(float m5)
+{
+	gl_RenderState.EnableDrawBuffers(1);
+	GLRenderer->AmbientOccludeScene(m5);
+	glViewport(screen->mSceneViewport.left, mSceneViewport.top, mSceneViewport.width, mSceneViewport.height);
+	GLRenderer->mBuffers->BindSceneFB(true);
+	gl_RenderState.EnableDrawBuffers(gl_RenderState.GetPassDrawBufferCount());
+	gl_RenderState.Apply();
+}
+
 
 //===========================================================================
 //
diff --git a/src/rendering/gl/system/gl_framebuffer.h b/src/rendering/gl/system/gl_framebuffer.h
index c8663a997..1875abdbd 100644
--- a/src/rendering/gl/system/gl_framebuffer.h
+++ b/src/rendering/gl/system/gl_framebuffer.h
@@ -27,6 +27,7 @@ public:
 	void InitializeState() override;
 	void Update() override;
 
+	void AmbientOccludeScene(float m5) override;
 	FRenderState* RenderState() override;
 	void CleanForRestart() override;
 	void UpdatePalette() override;
diff --git a/src/rendering/hwrenderer/scene/hw_drawinfo.cpp b/src/rendering/hwrenderer/scene/hw_drawinfo.cpp
index 143e77993..15c5ab290 100644
--- a/src/rendering/hwrenderer/scene/hw_drawinfo.cpp
+++ b/src/rendering/hwrenderer/scene/hw_drawinfo.cpp
@@ -47,6 +47,7 @@
 EXTERN_CVAR(Float, r_visibility)
 CVAR(Bool, gl_bandedswlight, false, CVAR_ARCHIVE)
 CVAR(Bool, gl_sort_textures, false, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
+CVAR(Bool, gl_no_skyclear, false, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
 
 sector_t * hw_FakeFlat(sector_t * sec, sector_t * dest, area_t in_area, bool back);
 
@@ -90,7 +91,6 @@ HWDrawInfo *FDrawInfoList::GetNew()
 
 void FDrawInfoList::Release(HWDrawInfo * di)
 {
-	di->DrawScene = nullptr;
 	di->ClearBuffers();
 	di->Level = nullptr;
 	mList.Push(di);
@@ -105,7 +105,6 @@ void FDrawInfoList::Release(HWDrawInfo * di)
 HWDrawInfo *HWDrawInfo::StartDrawInfo(FLevelLocals *lev, HWDrawInfo *parent, FRenderViewpoint &parentvp, HWViewpointUniforms *uniforms)
 {
 	HWDrawInfo *di = di_list.GetNew();
-	if (parent) di->DrawScene = parent->DrawScene;
 	di->Level = lev;
 	di->StartScene(parentvp, uniforms);
 	return di;
@@ -642,20 +641,82 @@ void HWDrawInfo::Set3DViewport(FRenderState &state)
 	state.SetStencil(0, SOP_Keep, SF_AllOn);
 }
 
+//-----------------------------------------------------------------------------
+//
+// gl_drawscene - this function renders the scene from the current
+// viewpoint, including mirrors and skyboxes and other portals
+// It is assumed that the HWPortal::EndFrame returns with the 
+// stencil, z-buffer and the projection matrix intact!
+//
+//-----------------------------------------------------------------------------
+
+void HWDrawInfo::DrawScene(int drawmode)
+{
+	static int recursion = 0;
+	static int ssao_portals_available = 0;
+	const auto& vp = Viewpoint;
+
+	bool applySSAO = false;
+	if (drawmode == DM_MAINVIEW)
+	{
+		ssao_portals_available = gl_ssao_portals;
+		applySSAO = true;
+	}
+	else if (drawmode == DM_OFFSCREEN)
+	{
+		ssao_portals_available = 0;
+	}
+	else if (drawmode == DM_PORTAL && ssao_portals_available > 0)
+	{
+		applySSAO = true;
+		ssao_portals_available--;
+	}
+
+	if (vp.camera != nullptr)
+	{
+		ActorRenderFlags savedflags = vp.camera->renderflags;
+		CreateScene(drawmode == DM_MAINVIEW);
+		vp.camera->renderflags = savedflags;
+	}
+	else
+	{
+		CreateScene(false);
+	}
+	auto& RenderState = *screen->RenderState();
+
+	RenderState.SetDepthMask(true);
+	if (!gl_no_skyclear) screen->mPortalState->RenderFirstSkyPortal(recursion, this, RenderState);
+
+	RenderScene(RenderState);
+
+	if (applySSAO && RenderState.GetPassType() == GBUFFER_PASS)
+	{
+		screen->AmbientOccludeScene(VPUniforms.mProjectionMatrix.get()[5]);
+		screen->mViewpoints->Bind(RenderState, vpIndex);
+	}
+
+	// Handle all portals after rendering the opaque objects but before
+	// doing all translucent stuff
+	recursion++;
+	screen->mPortalState->EndFrame(this, RenderState);
+	recursion--;
+	RenderTranslucent(RenderState);
+}
+
+
 //-----------------------------------------------------------------------------
 //
 // R_RenderView - renders one view - either the screen or a camera texture
 //
 //-----------------------------------------------------------------------------
 
-void HWDrawInfo::ProcessScene(bool toscreen, const std::function<void(HWDrawInfo *,int)> &drawScene)
+void HWDrawInfo::ProcessScene(bool toscreen)
 {
 	screen->mPortalState->BeginScene();
 
 	int mapsection = Level->PointInRenderSubsector(Viewpoint.Pos)->mapsection;
 	CurrentMapSections.Set(mapsection);
-	DrawScene = drawScene;
-	DrawScene(this, toscreen ? DM_MAINVIEW : DM_OFFSCREEN);
+	DrawScene(toscreen ? DM_MAINVIEW : DM_OFFSCREEN);
 
 }
 
diff --git a/src/rendering/hwrenderer/scene/hw_drawinfo.h b/src/rendering/hwrenderer/scene/hw_drawinfo.h
index 1a81a4a94..9b86ecf37 100644
--- a/src/rendering/hwrenderer/scene/hw_drawinfo.h
+++ b/src/rendering/hwrenderer/scene/hw_drawinfo.h
@@ -179,8 +179,6 @@ struct HWDrawInfo
 	fixed_t viewx, viewy;	// since the nodes are still fixed point, keeping the view position  also fixed point for node traversal is faster.
 	bool multithread;
 
-	std::function<void(HWDrawInfo *, int)> DrawScene = nullptr;
-
 private:
     // For ProcessLowerMiniseg
     bool inview;
@@ -246,6 +244,7 @@ public:
 	void SetViewArea();
 	int SetFullbrightFlags(player_t *player);
 
+	void DrawScene(int drawmode);
 	void CreateScene(bool drawpsprites);
 	void RenderScene(FRenderState &state);
 	void RenderTranslucent(FRenderState &state);
@@ -253,7 +252,7 @@ public:
 	void EndDrawScene(sector_t * viewsector, FRenderState &state);
 	void DrawEndScene2D(sector_t * viewsector, FRenderState &state);
 	void Set3DViewport(FRenderState &state);
-	void ProcessScene(bool toscreen, const std::function<void(HWDrawInfo *, int)> &drawScene);
+	void ProcessScene(bool toscreen);
 
 	bool DoOneSectorUpper(subsector_t * subsec, float planez, area_t in_area);
 	bool DoOneSectorLower(subsector_t * subsec, float planez, area_t in_area);
diff --git a/src/rendering/hwrenderer/scene/hw_portal.h b/src/rendering/hwrenderer/scene/hw_portal.h
index 88a920a2f..a6bf05f42 100644
--- a/src/rendering/hwrenderer/scene/hw_portal.h
+++ b/src/rendering/hwrenderer/scene/hw_portal.h
@@ -143,7 +143,7 @@ public:
 	{
 		if (Setup(di, state, di->mClipper))
 		{
-			di->DrawScene(di, DM_PORTAL);
+			di->DrawScene(DM_PORTAL);
 			Shutdown(di, state);
 		}
 		else state.ClearScreen();
diff --git a/src/rendering/polyrenderer/backend/poly_framebuffer.cpp b/src/rendering/polyrenderer/backend/poly_framebuffer.cpp
index b452e7924..658b31a80 100644
--- a/src/rendering/polyrenderer/backend/poly_framebuffer.cpp
+++ b/src/rendering/polyrenderer/backend/poly_framebuffer.cpp
@@ -59,7 +59,6 @@ EXTERN_CVAR(Bool, r_drawvoxels)
 EXTERN_CVAR(Int, gl_tonemap)
 EXTERN_CVAR(Int, screenblocks)
 EXTERN_CVAR(Bool, cl_capfps)
-EXTERN_CVAR(Bool, gl_no_skyclear)
 
 extern bool NoInterpolateView;
 extern int rendered_commandbuffers;
@@ -340,10 +339,7 @@ sector_t *PolyFrameBuffer::RenderViewpoint(FRenderViewpoint &mainvp, AActor * ca
 		vp.Pos += eye.GetViewShift(vp.HWAngles.Yaw.Degrees);
 		di->SetupView(*GetRenderState(), vp.Pos.X, vp.Pos.Y, vp.Pos.Z, false, false);
 
-		// std::function until this can be done better in a cross-API fashion.
-		di->ProcessScene(toscreen, [&](HWDrawInfo *di, int mode) {
-			DrawScene(di, mode);
-		});
+		di->ProcessScene(toscreen);
 
 		if (mainview)
 		{
@@ -398,60 +394,6 @@ void PolyFrameBuffer::RenderTextureView(FCanvasTexture *tex, AActor *Viewpoint,
 	tex->SetUpdated(true);
 }
 
-void PolyFrameBuffer::DrawScene(HWDrawInfo *di, int drawmode)
-{
-	// To do: this is virtually identical to FGLRenderer::DrawScene and should be merged.
-
-	static int recursion = 0;
-	static int ssao_portals_available = 0;
-	const auto &vp = di->Viewpoint;
-
-	bool applySSAO = false;
-	if (drawmode == DM_MAINVIEW)
-	{
-		ssao_portals_available = gl_ssao_portals;
-		applySSAO = true;
-	}
-	else if (drawmode == DM_OFFSCREEN)
-	{
-		ssao_portals_available = 0;
-	}
-	else if (drawmode == DM_PORTAL && ssao_portals_available > 0)
-	{
-		applySSAO = true;
-		ssao_portals_available--;
-	}
-
-	if (vp.camera != nullptr)
-	{
-		ActorRenderFlags savedflags = vp.camera->renderflags;
-		di->CreateScene(drawmode == DM_MAINVIEW);
-		vp.camera->renderflags = savedflags;
-	}
-	else
-	{
-		di->CreateScene(false);
-	}
-
-	GetRenderState()->SetDepthMask(true);
-	if (!gl_no_skyclear) mPortalState->RenderFirstSkyPortal(recursion, di, *GetRenderState());
-
-	di->RenderScene(*GetRenderState());
-
-	if (applySSAO && GetRenderState()->GetPassType() == GBUFFER_PASS)
-	{
-		//mPostprocess->AmbientOccludeScene(di->VPUniforms.mProjectionMatrix.get()[5]);
-		//mViewpoints->Bind(*GetRenderState(), di->vpIndex);
-	}
-
-	// Handle all portals after rendering the opaque objects but before
-	// doing all translucent stuff
-	recursion++;
-	mPortalState->EndFrame(di, *GetRenderState());
-	recursion--;
-	di->RenderTranslucent(*GetRenderState());
-}
-
 static uint8_t ToIntColorComponent(float v)
 {
 	return clamp((int)(v * 255.0f + 0.5f), 0, 255);
@@ -678,3 +620,8 @@ unsigned int PolyFrameBuffer::GetLightBufferBlockSize() const
 void PolyFrameBuffer::UpdateShadowMap()
 {
 }
+
+void PolyFrameBuffer::AmbientOccludeScene(float m5)
+{
+	//mPostprocess->AmbientOccludeScene(m5);
+}
diff --git a/src/rendering/polyrenderer/backend/poly_framebuffer.h b/src/rendering/polyrenderer/backend/poly_framebuffer.h
index 776d86412..2b5847623 100644
--- a/src/rendering/polyrenderer/backend/poly_framebuffer.h
+++ b/src/rendering/polyrenderer/backend/poly_framebuffer.h
@@ -47,6 +47,7 @@ public:
 	void BeginFrame() override;
 	void BlurScene(float amount) override;
 	void PostProcessScene(int fixedcm, const std::function<void()> &afterBloomDrawEndScene2D) override;
+	void AmbientOccludeScene(float m5) override;
 
 	IHardwareTexture *CreateHardwareTexture() override;
 	FModelRenderer *CreateModelRenderer(int mli) override;
@@ -71,7 +72,6 @@ public:
 private:
 	sector_t *RenderViewpoint(FRenderViewpoint &mainvp, AActor * camera, IntRect * bounds, float fov, float ratio, float fovratio, bool mainview, bool toscreen);
 	void RenderTextureView(FCanvasTexture *tex, AActor *Viewpoint, double FOV);
-	void DrawScene(HWDrawInfo *di, int drawmode);
 	void UpdateShadowMap();
 
 	void CheckCanvas();
diff --git a/src/rendering/v_video.h b/src/rendering/v_video.h
index d7d9d7e05..300b05442 100644
--- a/src/rendering/v_video.h
+++ b/src/rendering/v_video.h
@@ -311,6 +311,7 @@ public:
 	virtual const char* DeviceName() const { return "Unknown"; }
 	virtual void WriteSavePic(player_t *player, FileWriter *file, int width, int height);
 	virtual sector_t *RenderView(player_t *player) { return nullptr;  }
+	virtual void AmbientOccludeScene(float m5) {}
 
 	// Screen wiping
 	virtual FTexture *WipeStartScreen();
diff --git a/src/rendering/vulkan/system/vk_framebuffer.cpp b/src/rendering/vulkan/system/vk_framebuffer.cpp
index 0c7b9a0e7..32013a919 100644
--- a/src/rendering/vulkan/system/vk_framebuffer.cpp
+++ b/src/rendering/vulkan/system/vk_framebuffer.cpp
@@ -67,7 +67,6 @@ EXTERN_CVAR(Bool, r_drawvoxels)
 EXTERN_CVAR(Int, gl_tonemap)
 EXTERN_CVAR(Int, screenblocks)
 EXTERN_CVAR(Bool, cl_capfps)
-EXTERN_CVAR(Bool, gl_no_skyclear)
 
 extern bool NoInterpolateView;
 extern int rendered_commandbuffers;
@@ -480,10 +479,7 @@ sector_t *VulkanFrameBuffer::RenderViewpoint(FRenderViewpoint &mainvp, AActor *
 		vp.Pos += eye.GetViewShift(vp.HWAngles.Yaw.Degrees);
 		di->SetupView(*GetRenderState(), vp.Pos.X, vp.Pos.Y, vp.Pos.Z, false, false);
 
-		// std::function until this can be done better in a cross-API fashion.
-		di->ProcessScene(toscreen, [&](HWDrawInfo *di, int mode) {
-			DrawScene(di, mode);
-		});
+		di->ProcessScene(toscreen);
 
 		if (mainview)
 		{
@@ -548,60 +544,6 @@ void VulkanFrameBuffer::RenderTextureView(FCanvasTexture *tex, AActor *Viewpoint
 	tex->SetUpdated(true);
 }
 
-void VulkanFrameBuffer::DrawScene(HWDrawInfo *di, int drawmode)
-{
-	// To do: this is virtually identical to FGLRenderer::DrawScene and should be merged.
-
-	static int recursion = 0;
-	static int ssao_portals_available = 0;
-	const auto &vp = di->Viewpoint;
-
-	bool applySSAO = false;
-	if (drawmode == DM_MAINVIEW)
-	{
-		ssao_portals_available = gl_ssao_portals;
-		applySSAO = true;
-	}
-	else if (drawmode == DM_OFFSCREEN)
-	{
-		ssao_portals_available = 0;
-	}
-	else if (drawmode == DM_PORTAL && ssao_portals_available > 0)
-	{
-		applySSAO = true;
-		ssao_portals_available--;
-	}
-
-	if (vp.camera != nullptr)
-	{
-		ActorRenderFlags savedflags = vp.camera->renderflags;
-		di->CreateScene(drawmode == DM_MAINVIEW);
-		vp.camera->renderflags = savedflags;
-	}
-	else
-	{
-		di->CreateScene(false);
-	}
-
-	GetRenderState()->SetDepthMask(true);
-	if (!gl_no_skyclear) mPortalState->RenderFirstSkyPortal(recursion, di, *GetRenderState());
-
-	di->RenderScene(*GetRenderState());
-
-	if (applySSAO && GetRenderState()->GetPassType() == GBUFFER_PASS)
-	{
-		mPostprocess->AmbientOccludeScene(di->VPUniforms.mProjectionMatrix.get()[5]);
-		screen->mViewpoints->Bind(*GetRenderState(), di->vpIndex);
-	}
-
-	// Handle all portals after rendering the opaque objects but before
-	// doing all translucent stuff
-	recursion++;
-	screen->mPortalState->EndFrame(di, *GetRenderState());
-	recursion--;
-	di->RenderTranslucent(*GetRenderState());
-}
-
 void VulkanFrameBuffer::PostProcessScene(int fixedcm, const std::function<void()> &afterBloomDrawEndScene2D)
 {
 	mPostprocess->PostProcessScene(fixedcm, afterBloomDrawEndScene2D);
@@ -1000,3 +942,8 @@ FRenderState* VulkanFrameBuffer::RenderState()
 {
 	return mRenderState.get();
 }
+
+void VulkanFrameBuffer::AmbientOccludeScene(float m5)
+{
+	mPostprocess->AmbientOccludeScene(m5);
+}
diff --git a/src/rendering/vulkan/system/vk_framebuffer.h b/src/rendering/vulkan/system/vk_framebuffer.h
index 5535f1e8a..e9b6ac158 100644
--- a/src/rendering/vulkan/system/vk_framebuffer.h
+++ b/src/rendering/vulkan/system/vk_framebuffer.h
@@ -88,6 +88,7 @@ public:
 	void BeginFrame() override;
 	void BlurScene(float amount) override;
 	void PostProcessScene(int fixedcm, const std::function<void()> &afterBloomDrawEndScene2D) override;
+	void AmbientOccludeScene(float m5) override;
 
 	IHardwareTexture *CreateHardwareTexture() override;
 	FMaterial* CreateMaterial(FGameTexture* tex, int scaleflags) override;
@@ -114,7 +115,6 @@ public:
 private:
 	sector_t *RenderViewpoint(FRenderViewpoint &mainvp, AActor * camera, IntRect * bounds, float fov, float ratio, float fovratio, bool mainview, bool toscreen);
 	void RenderTextureView(FCanvasTexture *tex, AActor *Viewpoint, double FOV);
-	void DrawScene(HWDrawInfo *di, int drawmode);
 	void PrintStartupLog();
 	void CreateFanToTrisIndexBuffer();
 	void CopyScreenToBuffer(int w, int h, void *data);