diff --git a/src/gl/renderer/gl_renderer.cpp b/src/gl/renderer/gl_renderer.cpp
index f442c882cc3..6029c5139a5 100644
--- a/src/gl/renderer/gl_renderer.cpp
+++ b/src/gl/renderer/gl_renderer.cpp
@@ -236,17 +236,6 @@ void FGLRenderer::SetupLevel()
 //
 //===========================================================================
 
-void FGLRenderer::FlushTextures()
-{
-	FMaterial::FlushAll();
-}
-
-//===========================================================================
-// 
-//
-//
-//===========================================================================
-
 bool FGLRenderer::StartOffscreen()
 {
 	bool firstBind = (mFBID == 0);
@@ -372,7 +361,7 @@ void FGLRenderer::WriteSavePic (player_t *player, FileWriter *file, int width, i
     bounds.width = width;
     bounds.height = height;
     
-    // if GLRenderer->mVBO is persistently mapped we must be sure the GPU finished reading from it before we fill it with new data.
+    // if mVBO is persistently mapped we must be sure the GPU finished reading from it before we fill it with new data.
     glFinish();
     
     // Switch to render buffers dimensioned for the savepic
@@ -411,9 +400,9 @@ void FGLRenderer::WriteSavePic (player_t *player, FileWriter *file, int width, i
 
 void FGLRenderer::BeginFrame()
 {
-	buffersActive = GLRenderer->mScreenBuffers->Setup(screen->mScreenViewport.width, screen->mScreenViewport.height, screen->mSceneViewport.width, screen->mSceneViewport.height);
+	buffersActive = mScreenBuffers->Setup(screen->mScreenViewport.width, screen->mScreenViewport.height, screen->mSceneViewport.width, screen->mSceneViewport.height);
 	if (buffersActive)
-		buffersActive = GLRenderer->mSaveBuffers->Setup(SAVEPICWIDTH, SAVEPICHEIGHT, SAVEPICWIDTH, SAVEPICHEIGHT);
+		buffersActive = mSaveBuffers->Setup(SAVEPICWIDTH, SAVEPICHEIGHT, SAVEPICWIDTH, SAVEPICHEIGHT);
 }
 
 //===========================================================================
@@ -606,7 +595,7 @@ void FGLRenderer::Draw2D(F2DDrawer *drawer)
 	}
 	glDisable(GL_SCISSOR_TEST);
 
-	gl_RenderState.SetVertexBuffer(GLRenderer->mVBO);
+	gl_RenderState.SetVertexBuffer(mVBO);
 	gl_RenderState.EnableTexture(true);
 	gl_RenderState.EnableBrightmap(true);
 	gl_RenderState.SetTextureMode(TM_MODULATE);
diff --git a/src/gl/renderer/gl_renderer.h b/src/gl/renderer/gl_renderer.h
index 2d3f1ae33c3..71368e6441f 100644
--- a/src/gl/renderer/gl_renderer.h
+++ b/src/gl/renderer/gl_renderer.h
@@ -123,7 +123,6 @@ class FGLRenderer
 
 	void ClearBorders();
 
-	void FlushTextures();
 	void SetupLevel();
 	void ResetSWScene();
 
diff --git a/src/gl/system/gl_framebuffer.cpp b/src/gl/system/gl_framebuffer.cpp
index 8b5f5acfc5d..da71df30c1f 100644
--- a/src/gl/system/gl_framebuffer.cpp
+++ b/src/gl/system/gl_framebuffer.cpp
@@ -361,11 +361,6 @@ void OpenGLFrameBuffer::UnbindTexUnit(int no)
 	FHardwareTexture::Unbind(no);
 }
 
-void OpenGLFrameBuffer::FlushTextures()
-{
-	if (GLRenderer) GLRenderer->FlushTextures();
-}
-
 void OpenGLFrameBuffer::TextureFilterChanged()
 {
 	if (GLRenderer != NULL && GLRenderer->mSamplerManager != NULL) GLRenderer->mSamplerManager->SetTextureFilterMode();
diff --git a/src/gl/system/gl_framebuffer.h b/src/gl/system/gl_framebuffer.h
index d6f416d5eb6..dd002c9296c 100644
--- a/src/gl/system/gl_framebuffer.h
+++ b/src/gl/system/gl_framebuffer.h
@@ -37,7 +37,6 @@ class OpenGLFrameBuffer : public SystemFrameBuffer
 	IHardwareTexture *CreateHardwareTexture(FTexture *tex) override;
 	FModelRenderer *CreateModelRenderer(int mli) override;
 	void UnbindTexUnit(int no) override;
-	void FlushTextures() override;
 	void TextureFilterChanged() override;
 	void BeginFrame() override;
 	void SetViewportRects(IntRect *bounds) override;
diff --git a/src/hwrenderer/utility/hw_cvars.cpp b/src/hwrenderer/utility/hw_cvars.cpp
index 26c061de791..c849e62d5d8 100644
--- a/src/hwrenderer/utility/hw_cvars.cpp
+++ b/src/hwrenderer/utility/hw_cvars.cpp
@@ -25,6 +25,7 @@
 #include "c_dispatch.h"
 #include "v_video.h"
 #include "hw_cvars.h"
+#include "hwrenderer/textures/hw_material.h"
 #include "menu/menu.h"
 
 
@@ -91,7 +92,7 @@ CUSTOM_CVAR(Float,gl_texture_filter_anisotropic,8.0f,CVAR_ARCHIVE|CVAR_GLOBALCON
 
 CCMD(gl_flush)
 {
-	screen->FlushTextures();
+	FMaterial::FlushAll();
 }
 
 CUSTOM_CVAR(Int, gl_texture_filter, 4, CVAR_ARCHIVE|CVAR_GLOBALCONFIG|CVAR_NOINITCALL)
@@ -102,7 +103,7 @@ CUSTOM_CVAR(Int, gl_texture_filter, 4, CVAR_ARCHIVE|CVAR_GLOBALCONFIG|CVAR_NOINI
 
 CUSTOM_CVAR(Bool, gl_texture_usehires, true, CVAR_ARCHIVE|CVAR_NOINITCALL)
 {
-	screen->FlushTextures();
+	FMaterial::FlushAll();
 }
 
 CVAR(Bool, gl_precache, false, CVAR_ARCHIVE)
diff --git a/src/posix/sdl/sdlglvideo.cpp b/src/posix/sdl/sdlglvideo.cpp
index 83f0b1baea2..4e7e0fbec7a 100644
--- a/src/posix/sdl/sdlglvideo.cpp
+++ b/src/posix/sdl/sdlglvideo.cpp
@@ -111,7 +111,6 @@ SDLGLVideo::SDLGLVideo (int parm)
 
 SDLGLVideo::~SDLGLVideo ()
 {
-	if (GLRenderer != NULL) GLRenderer->FlushTextures();
 }
 
 DFrameBuffer *SDLGLVideo::CreateFrameBuffer ()
diff --git a/src/r_utility.cpp b/src/r_utility.cpp
index fc1aff73876..02188cad33b 100644
--- a/src/r_utility.cpp
+++ b/src/r_utility.cpp
@@ -1030,7 +1030,7 @@ void R_SetupFrame (FRenderViewpoint &viewpoint, FViewWindow &viewwindow, AActor
 	double angx = cos(radPitch);
 	double angy = sin(radPitch) * level.info->pixelstretch;
 	double alen = sqrt(angx*angx + angy*angy);
-	viewpoint.HWAngles.Pitch = (float)RAD2DEG(asin(angy / alen));
+	viewpoint.HWAngles.Pitch = RAD2DEG((float)asin(angy / alen));
 	
 	viewpoint.HWAngles.Roll.Degrees = viewpoint.Angles.Roll.Degrees;    // copied for convenience.
 	
diff --git a/src/textures/hires/hqresize.cpp b/src/textures/hires/hqresize.cpp
index eb121ced865..ccd0258565e 100644
--- a/src/textures/hires/hqresize.cpp
+++ b/src/textures/hires/hqresize.cpp
@@ -43,6 +43,7 @@
 #include "xbr/xbrz.h"
 #include "xbr/xbrz_old.h"
 #include "parallel_for.h"
+#include "hwrenderer/textures/hw_material.h"
 
 CUSTOM_CVAR(Int, gl_texture_hqresize, 0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_NOINITCALL)
 {
@@ -56,18 +57,18 @@ CUSTOM_CVAR(Int, gl_texture_hqresize, 0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR
 		if (self == 8) self = 10;
 		if (self == 9) self = 6;
 	#endif
-	screen->FlushTextures();
+	FMaterial::FlushAll();
 }
 
 CUSTOM_CVAR(Int, gl_texture_hqresize_maxinputsize, 512, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_NOINITCALL)
 {
 	if (self > 1024) self = 1024;
-	screen->FlushTextures();
+	FMaterial::FlushAll();
 }
 
 CUSTOM_CVAR(Int, gl_texture_hqresize_targets, 7, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_NOINITCALL)
 {
-	screen->FlushTextures();
+	FMaterial::FlushAll();
 }
 
 CVAR (Flag, gl_texture_hqresize_textures, gl_texture_hqresize_targets, 1);
diff --git a/src/v_video.h b/src/v_video.h
index 72208ec421e..de16b85ebf0 100644
--- a/src/v_video.h
+++ b/src/v_video.h
@@ -419,7 +419,6 @@ class DFrameBuffer
 	virtual IHardwareTexture *CreateHardwareTexture(FTexture *tex) { return nullptr; }
 	virtual FModelRenderer *CreateModelRenderer(int mli) { return nullptr; }
 	virtual void UnbindTexUnit(int no) {}
-	virtual void FlushTextures() {}
 	virtual void TextureFilterChanged() {}
 	virtual void BeginFrame() {}
 
diff --git a/src/win32/win32gliface.cpp b/src/win32/win32gliface.cpp
index dd9c360b5bc..c8fc87ffbdb 100644
--- a/src/win32/win32gliface.cpp
+++ b/src/win32/win32gliface.cpp
@@ -155,7 +155,6 @@ Win32GLVideo::Win32GLVideo(int parm)
 
 Win32GLVideo::~Win32GLVideo()
 {
-	if (GLRenderer != NULL) GLRenderer->FlushTextures();
 }
 
 //==========================================================================