diff --git a/src/gl/scene/gl_drawinfo.h b/src/gl/scene/gl_drawinfo.h
index cd37b455200..2859be99935 100644
--- a/src/gl/scene/gl_drawinfo.h
+++ b/src/gl/scene/gl_drawinfo.h
@@ -114,7 +114,7 @@ struct FDrawInfo : public HWDrawInfo
     
     // These should go into hwrenderer later.
     void SetViewMatrix(const FRotator &angles, float vx, float vy, float vz, bool mirror, bool planemirror);
-    void SetupView(float vx, float vy, float vz, DAngle va, bool mirror, bool planemirror);
+    void SetupView(float vx, float vy, float vz, bool mirror, bool planemirror);
 
 
 	static FDrawInfo *StartDrawInfo(FRenderViewpoint &parentvp, HWViewpointUniforms *uniforms);
diff --git a/src/gl/scene/gl_portal.cpp b/src/gl/scene/gl_portal.cpp
index 1c3b7c3b1cd..22687eaa7dc 100644
--- a/src/gl/scene/gl_portal.cpp
+++ b/src/gl/scene/gl_portal.cpp
@@ -316,7 +316,7 @@ void GLPortal::End(FDrawInfo *di, bool usestencil)
 
 		// Restore the old view
 		if (vp.camera != nullptr) vp.camera->renderflags = (vp.camera->renderflags & ~RF_MAYBEINVISIBLE) | savedvisibility;
-		di->SetupView(vp.Pos.X, vp.Pos.Y, vp.Pos.Z, vp.Angles.Yaw, !!(MirrorFlag & 1), !!(PlaneMirrorFlag & 1));
+		di->SetupView(vp.Pos.X, vp.Pos.Y, vp.Pos.Z, !!(MirrorFlag & 1), !!(PlaneMirrorFlag & 1));
 
 		{
 			ScopedColorMask colorMask(0, 0, 0, 0); // glColorMask(0, 0, 0, 0);						// no graphics
@@ -370,7 +370,7 @@ void GLPortal::End(FDrawInfo *di, bool usestencil)
 
 		// Restore the old view
 		if (vp.camera != nullptr) vp.camera->renderflags = (vp.camera->renderflags & ~RF_MAYBEINVISIBLE) | savedvisibility;
-		di->SetupView(vp.Pos.X, vp.Pos.Y, vp.Pos.Z, vp.Angles.Yaw, !!(MirrorFlag & 1), !!(PlaneMirrorFlag & 1));
+		di->SetupView(vp.Pos.X, vp.Pos.Y, vp.Pos.Z, !!(MirrorFlag & 1), !!(PlaneMirrorFlag & 1));
 
 		// This draws a valid z-buffer into the stencil's contents to ensure it
 		// doesn't get overwritten by the level's geometry.
@@ -577,7 +577,7 @@ void GLSkyboxPortal::DrawContents(FDrawInfo *di)
 	vp.ViewActor = origin;
 
 	inskybox = true;
-	di->SetupView(vp.Pos.X, vp.Pos.Y, vp.Pos.Z, vp.Angles.Yaw, !!(MirrorFlag & 1), !!(PlaneMirrorFlag & 1));
+	di->SetupView(vp.Pos.X, vp.Pos.Y, vp.Pos.Z, !!(MirrorFlag & 1), !!(PlaneMirrorFlag & 1));
 	di->SetViewArea();
 	ClearClipper(di);
 
@@ -684,7 +684,7 @@ void GLSectorStackPortal::DrawContents(FDrawInfo *di)
 	// avoid recursions!
 	if (origin->plane != -1) screen->instack[origin->plane]++;
 
-	di->SetupView(vp.Pos.X, vp.Pos.Y, vp.Pos.Z, vp.Angles.Yaw, !!(MirrorFlag&1), !!(PlaneMirrorFlag&1));
+	di->SetupView(vp.Pos.X, vp.Pos.Y, vp.Pos.Z, !!(MirrorFlag&1), !!(PlaneMirrorFlag&1));
 	SetupCoverage(di);
 	ClearClipper(di);
 	
@@ -740,7 +740,7 @@ void GLPlaneMirrorPortal::DrawContents(FDrawInfo *di)
 	PlaneMirrorMode = origin->fC() < 0 ? -1 : 1;
 
 	PlaneMirrorFlag++;
-	di->SetupView(vp.Pos.X, vp.Pos.Y, vp.Pos.Z, vp.Angles.Yaw, !!(MirrorFlag & 1), !!(PlaneMirrorFlag & 1));
+	di->SetupView(vp.Pos.X, vp.Pos.Y, vp.Pos.Z, !!(MirrorFlag & 1), !!(PlaneMirrorFlag & 1));
 	ClearClipper(di);
 
 	di->UpdateCurrentMapSection();
@@ -911,7 +911,7 @@ void GLMirrorPortal::DrawContents(FDrawInfo *di)
 	vp.ViewActor = nullptr;
 
 	MirrorFlag++;
-	di->SetupView(vp.Pos.X, vp.Pos.Y, vp.Pos.Z, vp.Angles.Yaw, !!(MirrorFlag&1), !!(PlaneMirrorFlag&1));
+	di->SetupView(vp.Pos.X, vp.Pos.Y, vp.Pos.Z, !!(MirrorFlag&1), !!(PlaneMirrorFlag&1));
 
 	di->mClipper->Clear();
 
@@ -988,7 +988,7 @@ void GLLineToLinePortal::DrawContents(FDrawInfo *di)
 	}
 
 	vp.ViewActor = nullptr;
-	di->SetupView(vp.Pos.X, vp.Pos.Y, vp.Pos.Z, vp.Angles.Yaw, !!(MirrorFlag&1), !!(PlaneMirrorFlag&1));
+	di->SetupView(vp.Pos.X, vp.Pos.Y, vp.Pos.Z, !!(MirrorFlag&1), !!(PlaneMirrorFlag&1));
 
 	ClearClipper(di);
 	gl_RenderState.SetClipLine(glport->lines[0]->mDestination);
diff --git a/src/gl/scene/gl_scene.cpp b/src/gl/scene/gl_scene.cpp
index 7db0911edd8..72f3d891588 100644
--- a/src/gl/scene/gl_scene.cpp
+++ b/src/gl/scene/gl_scene.cpp
@@ -104,7 +104,7 @@ void FDrawInfo::SetViewMatrix(const FRotator &angles, float vx, float vy, float
 // Setup the view rotation matrix for the given viewpoint
 //
 //-----------------------------------------------------------------------------
-void FDrawInfo::SetupView(float vx, float vy, float vz, DAngle va, bool mirror, bool planemirror)
+void FDrawInfo::SetupView(float vx, float vy, float vz, bool mirror, bool planemirror)
 {
 	auto &vp = Viewpoint;
 	vp.SetViewAngle(r_viewwindow);
@@ -506,12 +506,11 @@ sector_t * FGLRenderer::RenderViewpoint (FRenderViewpoint &mainvp, AActor * came
 
 		// Stereo mode specific perspective projection
 		di->VPUniforms.mProjectionMatrix = eye->GetProjection(fov, ratio, fovratio);
-		vp.SetViewAngle(r_viewwindow);
 		// Stereo mode specific viewpoint adjustment - temporarily shifts global ViewPos
 		eye->GetViewShift(vp.HWAngles.Yaw.Degrees, viewShift);
 		ScopedViewShifter viewShifter(vp.Pos, viewShift);
-		di->SetViewMatrix(vp.HWAngles, vp.Pos.X, vp.Pos.Y, vp.Pos.Z, false, false);
-		di->ApplyVPUniforms();
+		di->SetupView(vp.Pos.X, vp.Pos.Y, vp.Pos.Z, false, false);
+
 
 		di->ProcessScene(toscreen);
 
diff --git a/src/gl/scene/gl_skydome.cpp b/src/gl/scene/gl_skydome.cpp
index 52db58670f9..9f3ef2bd7a1 100644
--- a/src/gl/scene/gl_skydome.cpp
+++ b/src/gl/scene/gl_skydome.cpp
@@ -230,7 +230,7 @@ void GLSkyPortal::DrawContents(FDrawInfo *di)
 	gl_RenderState.BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 	bool oldClamp = gl_RenderState.SetDepthClamp(true);
 
-	di->SetupView(0, 0, 0, vp.Angles.Yaw, !!(MirrorFlag & 1), !!(PlaneMirrorFlag & 1));
+	di->SetupView(0, 0, 0, !!(MirrorFlag & 1), !!(PlaneMirrorFlag & 1));
 
 	gl_RenderState.SetVertexBuffer(GLRenderer->mSkyVBO);
 	if (origin->texture[0] && origin->texture[0]->tex->bSkybox)