diff --git a/src/fts/helpers.ts b/src/fts/helpers.ts
index ac7bb9d..8ee15f6 100644
--- a/src/fts/helpers.ts
+++ b/src/fts/helpers.ts
@@ -4,8 +4,12 @@ import { ArxPolygon, ArxPolygonFlags } from '@fts/Polygon.js'
 import { ArxVertex } from '@fts/Vertex.js'
 import { COORDS_THAT_ROUND_UP } from '@fts/constants.js'
 
-const isQuad = (polygon: ArxPolygon) => {
-  return (polygon.flags & ArxPolygonFlags.Quad) !== 0
+export const isQuad = ({ flags }: { flags: ArxPolygonFlags }) => {
+  return (flags & ArxPolygonFlags.Quad) !== 0
+}
+
+export const isTiled = ({ flags }: { flags: ArxPolygonFlags }) => {
+  return (flags & ArxPolygonFlags.Tiled) !== 0
 }
 
 export const addLightIndex = (polygons: ArxPolygon[]) => {
diff --git a/src/utils.ts b/src/utils.ts
index d6346f9..b7828b3 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,4 +1,4 @@
-export { getCellCoords } from '@fts/helpers.js'
+export { getCellCoords, isQuad, isTiled } from '@fts/helpers.js'
 
 export type { DoubleOf, TripleOf, QuadrupleOf, Optional, Expand, RecursiveExpand } from '@common/types.js'