diff --git a/src/materials/Material.ts b/src/materials/Material.ts
index 580404b..ae2c355 100644
--- a/src/materials/Material.ts
+++ b/src/materials/Material.ts
@@ -91,10 +91,11 @@ export function materialComponent<P extends Readonly<ComponentPropsOptions>>(
   })
 }
 
+// TODO : proper
 export const BasicMaterial = materialComponent('BasicMaterial', { props: { type: Object as PropType<BasicMaterialPropsInterface>, default: () => ({}) } }, (opts) => new MeshBasicMaterial(opts))
 export const LambertMaterial = materialComponent('LambertMaterial', { props: { type: Object as PropType<LambertMaterialPropsInterface>, default: () => ({}) } }, (opts) => new MeshLambertMaterial(opts))
-export const PhongMaterial = materialComponent('PhongMaterial', { props: Object as PropType<PhongMaterialPropsInterface> }, (opts) => new MeshPhongMaterial(opts))
-export const PhysicalMaterial = materialComponent('PhysicalMaterial', { props: Object as PropType<PhysicalMaterialPropsInterface> }, (opts) => new MeshPhysicalMaterial(opts))
-export const PointsMaterial = materialComponent('PointsMaterial', { props: Object as PropType<PointsMaterialPropsInterface> }, (opts) => new TPointsMaterial(opts))
-export const StandardMaterial = materialComponent('StandardMaterial', { props: Object as PropType<StandardMaterialPropsInterface> }, (opts) => new MeshStandardMaterial(opts))
-export const ToonMaterial = materialComponent('ToonMaterial', { props: Object as PropType<ToonMaterialPropsInterface> }, (opts) => new MeshToonMaterial(opts))
+export const PhongMaterial = materialComponent('PhongMaterial', { props: { type: Object as PropType<PhongMaterialPropsInterface>, default: () => ({}) } }, (opts) => new MeshPhongMaterial(opts))
+export const PhysicalMaterial = materialComponent('PhysicalMaterial', { props: { type: Object as PropType<PhysicalMaterialPropsInterface>, default: () => ({}) } }, (opts) => new MeshPhysicalMaterial(opts))
+export const PointsMaterial = materialComponent('PointsMaterial', { props: { type: Object as PropType<PointsMaterialPropsInterface>, default: () => ({}) } }, (opts) => new TPointsMaterial(opts))
+export const StandardMaterial = materialComponent('StandardMaterial', { props: { type: Object as PropType<StandardMaterialPropsInterface>, default: () => ({}) } }, (opts) => new MeshStandardMaterial(opts))
+export const ToonMaterial = materialComponent('ToonMaterial', { props: { type: Object as PropType<ToonMaterialPropsInterface>, default: () => ({}) } }, (opts) => new MeshToonMaterial(opts))