diff --git a/ref/gl/gl_backend.c b/ref/gl/gl_backend.c
index e3982c38..66497afc 100644
--- a/ref/gl/gl_backend.c
+++ b/ref/gl/gl_backend.c
@@ -438,26 +438,31 @@ void GL_SetRenderMode( int mode )
 	{
 	case kRenderNormal:
 	default:
+		R_AllowFog( true );
 		pglDisable( GL_BLEND );
 		pglDisable( GL_ALPHA_TEST );
 		break;
 	case kRenderTransColor:
 	case kRenderTransTexture:
+		R_AllowFog( true );
 		pglEnable( GL_BLEND );
 		pglDisable( GL_ALPHA_TEST );
 		pglBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
 		break;
 	case kRenderTransAlpha:
+		R_AllowFog( true );
 		pglDisable( GL_BLEND );
 		pglEnable( GL_ALPHA_TEST );
 		break;
 	case kRenderGlow:
 	case kRenderTransAdd:
+		R_AllowFog( false );
 		pglEnable( GL_BLEND );
 		pglDisable( GL_ALPHA_TEST );
 		pglBlendFunc( GL_SRC_ALPHA, GL_ONE );
 		break;
 	case kRenderScreenFadeModulate:
+		R_AllowFog( true );
 		pglEnable( GL_BLEND );
 		pglDisable( GL_ALPHA_TEST );
 		pglBlendFunc( GL_ZERO, GL_SRC_COLOR );
diff --git a/ref/gl/gl_rpart.c b/ref/gl/gl_rpart.c
index 9264170d..f5d7b906 100644
--- a/ref/gl/gl_rpart.c
+++ b/ref/gl/gl_rpart.c
@@ -181,6 +181,7 @@ void CL_DrawTracers( double frametime, particle_t *cl_active_tracers )
 	if( !TriSpriteTexture( gEngfuncs.GetDefaultSprite( REF_DOT_SPRITE ), 0 ))
 		return;
 
+	R_AllowFog( false );
 	pglEnable( GL_BLEND );
 	pglBlendFunc( GL_SRC_ALPHA, GL_ONE );
 	pglDisable( GL_ALPHA_TEST );
@@ -267,6 +268,7 @@ void CL_DrawTracers( double frametime, particle_t *cl_active_tracers )
 	pglEnd();
 
 	pglDepthMask( GL_TRUE );
+	R_AllowFog( true );
 }
 
 /*
diff --git a/ref/gl/gl_studio.c b/ref/gl/gl_studio.c
index 7709f8d7..b183df32 100644
--- a/ref/gl/gl_studio.c
+++ b/ref/gl/gl_studio.c
@@ -2866,6 +2866,9 @@ static void R_StudioSetupRenderer( int rendermode )
 	if( rendermode > kRenderTransAdd ) rendermode = 0;
 	g_studio.rendermode = bound( 0, rendermode, kRenderTransAdd );
 
+	if( g_studio.rendermode == kRenderTransAdd || g_studio.rendermode == kRenderGlow )
+		R_AllowFog( false );
+
 	pglTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 	pglDisable( GL_ALPHA_TEST );
 	pglShadeModel( GL_SMOOTH );
@@ -2892,6 +2895,9 @@ static void R_StudioRestoreRenderer( void )
 	if( g_studio.rendermode != kRenderNormal )
 		pglDisable( GL_BLEND );
 
+	if( g_studio.rendermode == kRenderTransAdd || g_studio.rendermode == kRenderGlow )
+		R_AllowFog( true );
+
 	pglTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE );
 	pglShadeModel( GL_FLAT );
 	m_fDoRemap = false;
diff --git a/ref/gl/gl_triapi.c b/ref/gl/gl_triapi.c
index 81cb06bf..6d73209c 100644
--- a/ref/gl/gl_triapi.c
+++ b/ref/gl/gl_triapi.c
@@ -45,21 +45,25 @@ void TriRenderMode( int mode )
 	switch( mode )
 	{
 	case kRenderNormal:
+		R_AllowFog( true );
 		pglDisable( GL_BLEND );
 		pglDepthMask( GL_TRUE );
 		break;
 	case kRenderTransAlpha:
+		R_AllowFog( true );
 		pglEnable( GL_BLEND );
 		pglBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
 		pglDepthMask( GL_FALSE );
 		break;
 	case kRenderTransColor:
 	case kRenderTransTexture:
+		R_AllowFog( true );
 		pglEnable( GL_BLEND );
 		pglBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
 		break;
 	case kRenderGlow:
 	case kRenderTransAdd:
+		R_AllowFog( false );
 		pglBlendFunc( GL_SRC_ALPHA, GL_ONE );
 		pglEnable( GL_BLEND );
 		pglDepthMask( GL_FALSE );