diff --git a/neo/framework/DeclManager.cpp b/neo/framework/DeclManager.cpp
index fbcc84e9..17a31cec 100644
--- a/neo/framework/DeclManager.cpp
+++ b/neo/framework/DeclManager.cpp
@@ -3052,7 +3052,7 @@ void idDeclManagerLocal::ExportImagesToTrenchBroom_f( const idCmdArgs& args )
 
 					if( img.width > 16 && img.height > 16 )
 					{
-						R_WritePNG( exportName, scaled, 4, img.width, img.height, true, "fs_basepath" );
+						R_WritePNG( exportName, scaled, 4, img.width, img.height, "fs_basepath" );
 					}
 					else
 					{
@@ -3066,7 +3066,7 @@ void idDeclManagerLocal::ExportImagesToTrenchBroom_f( const idCmdArgs& args )
 				{
 					if( img.width > 16 && img.height > 16 )
 					{
-						R_WritePNG( exportName, rgba.Ptr(), 4, img.width, img.height, true, "fs_basepath" );
+						R_WritePNG( exportName, rgba.Ptr(), 4, img.width, img.height, "fs_basepath" );
 					}
 					else
 					{
diff --git a/neo/renderer/Image.h b/neo/renderer/Image.h
index c48b8021..67159682 100644
--- a/neo/renderer/Image.h
+++ b/neo/renderer/Image.h
@@ -533,7 +533,7 @@ void	R_WriteTGA( const char* filename, const byte* data, int width, int height,
 // data is in top-to-bottom raster order unless flipVertical is set
 
 // RB begin
-void	R_WritePNG( const char* filename, const byte* data, int bytesPerPixel, int width, int height, bool flipVertical = false, const char* basePath = "fs_savepath" );
+void	R_WritePNG( const char* filename, const byte* data, int bytesPerPixel, int width, int height, const char* basePath = "fs_savepath" );
 void	R_WriteEXR( const char* filename, const void* data, int channelsPerPixel, int width, int height, const char* basePath = "fs_savepath" );
 // RB end
 
diff --git a/neo/renderer/Image_files.cpp b/neo/renderer/Image_files.cpp
index 5bff6807..4eefac4d 100644
--- a/neo/renderer/Image_files.cpp
+++ b/neo/renderer/Image_files.cpp
@@ -515,7 +515,7 @@ static void WriteScreenshotForSTBIW( void* context, void* data, int size )
 R_WritePNG
 ================
 */
-void R_WritePNG( const char* filename, const byte* data, int bytesPerPixel, int width, int height, bool flipVertical, const char* basePath )
+void R_WritePNG( const char* filename, const byte* data, int bytesPerPixel, int width, int height, const char* basePath )
 {
 	if( bytesPerPixel != 4  && bytesPerPixel != 3 )
 	{
diff --git a/neo/renderer/Material.cpp b/neo/renderer/Material.cpp
index 5b3c31ad..09503040 100644
--- a/neo/renderer/Material.cpp
+++ b/neo/renderer/Material.cpp
@@ -4030,7 +4030,7 @@ CONSOLE_COMMAND_SHIP( makeMaterials, "Make .mtr file from a models or textures f
 
 						// don't destroy the original image and save it as new one
 						idStr mergedName = baseName + "_rgba.png";
-						R_WritePNG( mergedName, static_cast<byte*>( pic ), 4, width, height, true, "fs_basepath" );
+						R_WritePNG( mergedName, static_cast<byte*>( pic ), 4, width, height, "fs_basepath" );
 
 						mtrBuffer += "\t{\n";
 						mtrBuffer += "\t\tblend basecolormap\n";
@@ -4184,7 +4184,7 @@ CONSOLE_COMMAND_SHIP( makeMaterials, "Make .mtr file from a models or textures f
 
 					// don't destroy the original image and save it as new one
 					idStr mergedName = baseName + "_rmao.png";
-					R_WritePNG( mergedName, static_cast<byte*>( roughPic ), 4, roughWidth, roughHeight, true, "fs_basepath" );
+					R_WritePNG( mergedName, static_cast<byte*>( roughPic ), 4, roughWidth, roughHeight, "fs_basepath" );
 
 					mtrBuffer += va( "\trmaomap %s\n", mergedName.c_str() );
 				}
diff --git a/neo/renderer/RenderSystem_init.cpp b/neo/renderer/RenderSystem_init.cpp
index 3c18d6c1..7e253e6e 100644
--- a/neo/renderer/RenderSystem_init.cpp
+++ b/neo/renderer/RenderSystem_init.cpp
@@ -849,7 +849,7 @@ bool R_ReadPixelsRGB8( nvrhi::IDevice* device, CommonRenderPasses* pPasses, nvrh
 #if defined(__APPLE__)
 	R_WritePNG( fullname, static_cast<byte*>( pData ), 4, desc.width, desc.height, true, "fs_savepath" );
 #else
-	R_WritePNG( fullname, static_cast<byte*>( pData ), 4, desc.width, desc.height, true, "fs_basepath" );
+	R_WritePNG( fullname, static_cast<byte*>( pData ), 4, desc.width, desc.height, "fs_basepath" );
 #endif
 
 	if( newData )
diff --git a/neo/renderer/RenderWorld_envprobes.cpp b/neo/renderer/RenderWorld_envprobes.cpp
index c49b4733..2dcf1d45 100644
--- a/neo/renderer/RenderWorld_envprobes.cpp
+++ b/neo/renderer/RenderWorld_envprobes.cpp
@@ -1213,7 +1213,7 @@ CONSOLE_COMMAND( makeBrdfLUT, "make a GGX BRDF lookup table", NULL )
 	idStr fullname = "env/_brdfLut.png";
 	idLib::Printf( "writing %s\n", fullname.c_str() );
 
-	R_WritePNG( fullname, ldrBuffer, 4, outSize, outSize, true, "fs_basepath" );
+	R_WritePNG( fullname, ldrBuffer, 4, outSize, outSize, "fs_basepath" );
 	//R_WriteEXR( "env/_brdfLut.exr", hdrBuffer, 4, outSize, outSize, "fs_basepath" );
 
 
diff --git a/neo/swf/SWF_Image.cpp b/neo/swf/SWF_Image.cpp
index 2f2d8db2..a153f7e0 100644
--- a/neo/swf/SWF_Image.cpp
+++ b/neo/swf/SWF_Image.cpp
@@ -391,7 +391,7 @@ void idSWF::WriteSwfImageAtlas( const char* filename )
 
 	// the TGA is only for examination during development
 	//R_WriteTGA( filename, swfAtlas.Ptr(), atlasWidth, atlasHeight, false, "fs_basepath" );
-	R_WritePNG( filename, swfAtlas.Ptr(), 4, atlasWidth, atlasHeight, true, "fs_basepath" );
+	R_WritePNG( filename, swfAtlas.Ptr(), 4, atlasWidth, atlasHeight, "fs_basepath" );
 }
 
 /*
diff --git a/neo/swf/SWF_Load.cpp b/neo/swf/SWF_Load.cpp
index 8149a7dc..c58cee72 100644
--- a/neo/swf/SWF_Load.cpp
+++ b/neo/swf/SWF_Load.cpp
@@ -236,7 +236,7 @@ void idSWF::WriteSWF( const char* swfFilename, const byte* atlasImageRGBA, int a
 				filenameWithoutExt.StripFileExtension();
 				sprintf( imageExportFileName, "exported/%s/image_characterid_%i.png", filenameWithoutExt.c_str(), i );
 
-				R_WritePNG( imageExportFileName.c_str(), pngData.Ptr(), 4, width, height, true, "fs_basepath" );
+				R_WritePNG( imageExportFileName.c_str(), pngData.Ptr(), 4, width, height, "fs_basepath" );
 
 				// RB: add some extra space for zlib
 				idTempArray<byte> compressedData( width * height * 4 * 1.02 + 12 );
diff --git a/neo/swf/SWF_Main.cpp b/neo/swf/SWF_Main.cpp
index d59ac9bf..2bf9a358 100644
--- a/neo/swf/SWF_Main.cpp
+++ b/neo/swf/SWF_Main.cpp
@@ -303,7 +303,7 @@ idSWF::idSWF( const char* filename_, idSoundWorld* soundWorld_ )
 				atlasFileNameExport.Replace( "generated/", "exported/" );
 				atlasFileNameExport.SetFileExtension( ".png" );
 
-				R_WritePNG( atlasFileNameExport, rgba.Ptr(), 4, img.width, img.height, true, "fs_basepath" );
+				R_WritePNG( atlasFileNameExport, rgba.Ptr(), 4, img.width, img.height, "fs_basepath" );
 
 				if( postLoadExportFlashToSWF.GetBool() )
 				{