diff --git a/contrib/ufoai/ufoai_filters.cpp b/contrib/ufoai/ufoai_filters.cpp
index a7e63db8..cd68f246 100644
--- a/contrib/ufoai/ufoai_filters.cpp
+++ b/contrib/ufoai/ufoai_filters.cpp
@@ -10,19 +10,21 @@ static bfilter_t* filters[FILTER_MAX];
 
 void UFOAIFilterInit (void)
 {
+	// texture name filters
 	filters[FILTER_ACTORCLIP] = FilterAdd(1, 0, "actorclip", 0);
 	filters[FILTER_WEAPONCLIP] = FilterAdd(1, 0, "weaponclip", 0);
 	filters[FILTER_NODRAW] = FilterAdd(1, 0, "nodraw", 0);
 	filters[FILTER_STEPON] = FilterAdd(1, 0, "stepon", 0);
 
-	filters[FILTER_LEVEL1] = FilterAdd(2, UFOAI_CONTENTS_LEVEL_1, "level1", 0);
-	filters[FILTER_LEVEL2] = FilterAdd(2, UFOAI_CONTENTS_LEVEL_2, "level2", 0);
-	filters[FILTER_LEVEL3] = FilterAdd(2, UFOAI_CONTENTS_LEVEL_3, "level3", 0);
-	filters[FILTER_LEVEL4] = FilterAdd(2, UFOAI_CONTENTS_LEVEL_4, "level4", 0);
-	filters[FILTER_LEVEL5] = FilterAdd(2, UFOAI_CONTENTS_LEVEL_5, "level5", 0);
-	filters[FILTER_LEVEL6] = FilterAdd(2, UFOAI_CONTENTS_LEVEL_6, "level6", 0);
-	filters[FILTER_LEVEL7] = FilterAdd(2, UFOAI_CONTENTS_LEVEL_7, "level7", 0);
-	filters[FILTER_LEVEL8] = FilterAdd(2, UFOAI_CONTENTS_LEVEL_8, "level8", 0);
+	// content flag filters
+	filters[FILTER_LEVEL1] = FilterAdd(7, UFOAI_CONTENTS_LEVEL_1, "level1", 0);
+	filters[FILTER_LEVEL2] = FilterAdd(7, UFOAI_CONTENTS_LEVEL_2, "level2", 0);
+	filters[FILTER_LEVEL3] = FilterAdd(7, UFOAI_CONTENTS_LEVEL_3, "level3", 0);
+	filters[FILTER_LEVEL4] = FilterAdd(7, UFOAI_CONTENTS_LEVEL_4, "level4", 0);
+	filters[FILTER_LEVEL5] = FilterAdd(7, UFOAI_CONTENTS_LEVEL_5, "level5", 0);
+	filters[FILTER_LEVEL6] = FilterAdd(7, UFOAI_CONTENTS_LEVEL_6, "level6", 0);
+	filters[FILTER_LEVEL7] = FilterAdd(7, UFOAI_CONTENTS_LEVEL_7, "level7", 0);
+	filters[FILTER_LEVEL8] = FilterAdd(7, UFOAI_CONTENTS_LEVEL_8, "level8", 0);
 
 	Sys_Printf("UFO:AI Filters initialized\n");
 }
@@ -36,10 +38,10 @@ void PerformFiltering (int type)
 
 	if (filters[type]->active) {
 		filters[type]->active = false;
-		Sys_Printf("filter %i deactivated\n", type);
+		//Sys_Printf("filter %i deactivated (mask %i 0x%x)\n", type, filters[type]->mask, filters[type]->mask);
 	} else {
 		filters[type]->active = true;
-		Sys_Printf("filter %i activated\n", type);
+		//Sys_Printf("filter %i activated (mask %i 0x%x)\n", type, filters[type]->mask, filters[type]->mask);
 	}
 
 	FiltersActivate();
diff --git a/include/qertypes.h b/include/qertypes.h
index ad785cfe..a3b8caac 100644
--- a/include/qertypes.h
+++ b/include/qertypes.h
@@ -753,6 +753,8 @@ struct bfilter_t //c++ style
 							// 2=brush->pPatch->pShader->getFlags()
 							// 3=brush->owner->eclass->name
 							// 4=brush->owner->eclass->nShowFlags
+							// 5=brush->face->texdef.flags (q2)
+							// 6=brush->face->texdef.contents (q2)
 	int		mask;
 	char	*string;
 	bool	active;
diff --git a/radiant/filters.cpp b/radiant/filters.cpp
index 4931d4d3..5e0b069e 100644
--- a/radiant/filters.cpp
+++ b/radiant/filters.cpp
@@ -34,13 +34,16 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 // type 3 = entity filter (name)
 // type 2 = QER_* shader flags
 // type 4 = entity classes
+// type 5 = surface flags (q2)
+// type 6 = content flags (q2)
+// type 7 = content flags - no match (q2)
 bfilter_t *FilterAdd(bfilter_t *pFilter, int type, int bmask, char *str, int exclude)
 {
 	bfilter_t *pNew = new bfilter_t;
 	pNew->next = pFilter;
 	pNew->attribute = type;
 	if (type == 1 || type == 3) pNew->string = str;
-	if (type == 2 || type == 4) pNew->mask = bmask;
+	if (type == 2 || type == 4 || type == 5 || type == 6 || type == 7) pNew->mask = bmask;
 	if (g_qeglobals.d_savedinfo.exclude & exclude)
 		pNew->active = true;
 	else
@@ -164,8 +167,10 @@ bool FilterBrush(brush_t *pb)
 			filters != NULL;
 			filters = filters->next)
 			{
+				if (!filters->active)
+					continue;
 				// exclude by attribute 1 brush->face->pShader->getName()
-				if (filters->active && filters->attribute == 1)
+				if (filters->attribute == 1)
 				{
 					if (strstr(f->pShader->getName(),filters->string))
 					{
@@ -174,14 +179,38 @@ bool FilterBrush(brush_t *pb)
 					}
 				}
 				// exclude by attribute 2 brush->face->pShader->getFlags()
-				else if (filters->active
-					&& filters->attribute == 2)
+				else if (filters->attribute == 2)
 				{
 					if (f->pShader->getFlags() & filters->mask)
 					{
 						filterbrush=true;
 						break;
 					}
+				// quake2 - 5 == surface flags, 6 == content flags 
+				}
+				else if (filters->attribute == 5)
+				{
+					if (f->texdef.flags && f->texdef.flags & filters->mask)
+					{
+						filterbrush=true;
+						break;
+					}
+				}
+				else if (filters->attribute == 6)
+				{
+					if (f->texdef.contents && f->texdef.contents & filters->mask)
+					{
+						filterbrush=true;
+						break;
+					}
+				}
+				else if (filters->attribute == 7)
+				{
+					if (f->texdef.contents && !(f->texdef.contents & filters->mask))
+					{
+						filterbrush=true;
+						break;
+					}
 				}
 			}
 			if (!filterbrush)