@@ -35,7 +35,7 @@ export const BatchedBuildings = memo<BatchedBuildingsProps>(({ buildingsCenter,
3535
3636 const [ hovered , hover ] = useState < number > ( )
3737
38- const { data, vertexCount, indexCount } = useMemo ( ( ) => {
38+ const { data, vertexCount, indexCount, key } = useMemo ( ( ) => {
3939 // lights
4040 const c00 = _color . set ( '#f0c505' ) . getHSL ( { h : 0 , s : 0 , l : 0 } ) ;
4141 const c01 = _color . set ( '#f38630' ) . getHSL ( { h : 0 , s : 0 , l : 0 } ) ;
@@ -69,7 +69,8 @@ export const BatchedBuildings = memo<BatchedBuildingsProps>(({ buildingsCenter,
6969 } ) ;
7070 const vertexCount = data . reduce ( ( acc , d ) => acc + d . vertexCount , 0 ) ;
7171 const indexCount = data . reduce ( ( acc , d ) => acc + d . indexCount , 0 ) ;
72- return { data, vertexCount, indexCount } ;
72+ const key = MathUtils . generateUUID ( ) ;
73+ return { data, vertexCount, indexCount, key } ;
7374 } , [ origin , buildings ] )
7475
7576 const meshRef = useRef < BatchedMesh > ( null ) ;
@@ -92,9 +93,7 @@ export const BatchedBuildings = memo<BatchedBuildingsProps>(({ buildingsCenter,
9293
9394 material . setValue ( item . i , 'roughness' , roughness ) ;
9495 material . setValue ( item . i , 'metalness' , metalness ) ;
95-
9696 }
97-
9897 } )
9998
10099 useLayoutEffect ( ( ) => {
@@ -106,6 +105,7 @@ export const BatchedBuildings = memo<BatchedBuildingsProps>(({ buildingsCenter,
106105 } , [ data ] ) ; // eslint-disable-line react-hooks/exhaustive-deps
107106
108107 return < batchedMesh
108+ key = { key }
109109 ref = { meshRef }
110110 args = { [ data . length , vertexCount , indexCount ] }
111111 rotation = { [ - 90 * MathUtils . DEG2RAD , 0 , - 90 * MathUtils . DEG2RAD ] }
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