diff --git a/src/materials/MeshBasicMaterial.d.ts b/src/materials/MeshBasicMaterial.d.ts
index 10e790696199dadf8653b0cb6f8a5bdae515cb3e..751b5c4f2ec7eb6728c81761a7300c164d648330 100644
--- a/src/materials/MeshBasicMaterial.d.ts
+++ b/src/materials/MeshBasicMaterial.d.ts
@@ -8,12 +8,12 @@ import { Combine } from '../constants';
 export interface MeshBasicMaterialParameters extends MaterialParameters {
 	color?: Color | string | number;
 	opacity?: number;
-	map?: Texture;
-	aoMap?: Texture;
+	map?: Texture | null;
+	aoMap?: Texture | null;
 	aoMapIntensity?: number;
-	specularMap?: Texture;
-	alphaMap?: Texture;
-	envMap?: Texture;
+	specularMap?: Texture | null;
+	alphaMap?: Texture | null;
+	envMap?: Texture | null;
 	combine?: Combine;
 	reflectivity?: number;
 	refractionRatio?: number;
@@ -27,7 +27,7 @@ export interface MeshBasicMaterialParameters extends MaterialParameters {
 
 export class MeshBasicMaterial extends Material {
 
-	constructor( parameters?: MeshBasicMaterialParameters );
+	constructor(parameters?: MeshBasicMaterialParameters);
 
 	color: Color;
 	map: Texture | null;
@@ -46,6 +46,6 @@ export class MeshBasicMaterial extends Material {
 	skinning: boolean;
 	morphTargets: boolean;
 
-	setValues( parameters: MeshBasicMaterialParameters ): void;
+	setValues(parameters: MeshBasicMaterialParameters): void;
 
 }
diff --git a/src/materials/MeshDepthMaterial.d.ts b/src/materials/MeshDepthMaterial.d.ts
index 275047de22618eaa6b072e2d83d7b150cc1c8083..4d169a8bb1da92bce6141c3ea930bdf6670221a5 100644
--- a/src/materials/MeshDepthMaterial.d.ts
+++ b/src/materials/MeshDepthMaterial.d.ts
@@ -4,7 +4,7 @@ import { Texture } from './../textures/Texture';
 
 export interface MeshDepthMaterialParameters extends MaterialParameters {
 	depthPacking?: DepthPackingStrategies;
-	displacementMap?: Texture;
+	displacementMap?: Texture | null;
 	displacementScale?: number;
 	displacementBias?: number;
 	wireframe?: boolean;
diff --git a/src/materials/MeshDistanceMaterial.d.ts b/src/materials/MeshDistanceMaterial.d.ts
index 69373685f56a5f6f6a02a3a7ae1bc36144eb6d8a..840b5d4a3119d1ece87e6ef0b16c9704deab50f0 100644
--- a/src/materials/MeshDistanceMaterial.d.ts
+++ b/src/materials/MeshDistanceMaterial.d.ts
@@ -6,7 +6,7 @@ export interface MeshDistanceMaterialParameters extends MaterialParameters {
 	referencePosition?: Vector3;
 	nearDistance?: number;
 	farDistance?: number;
-	displacementMap?: Texture;
+	displacementMap?: Texture | null;
 	displacementScale?: number;
 	displacementBias?: number;
 }
diff --git a/src/materials/MeshLambertMaterial.d.ts b/src/materials/MeshLambertMaterial.d.ts
index 7d4c6e47cee0013f5277710956607e6654cc0a19..787c578bf0b7733c0a027311f49160d652e94f3f 100644
--- a/src/materials/MeshLambertMaterial.d.ts
+++ b/src/materials/MeshLambertMaterial.d.ts
@@ -7,15 +7,15 @@ export interface MeshLambertMaterialParameters extends MaterialParameters {
 	color?: Color | string | number;
 	emissive?: Color | string | number;
 	emissiveIntensity?: number;
-	emissiveMap?: Texture;
-	map?: Texture;
-	lightMap?: Texture;
+	emissiveMap?: Texture | null;
+	map?: Texture | null;
+	lightMap?: Texture | null;
 	lightMapIntensity?: number;
-	aoMap?: Texture;
+	aoMap?: Texture | null;
 	aoMapIntensity?: number;
-	specularMap?: Texture;
-	alphaMap?: Texture;
-	envMap?: Texture;
+	specularMap?: Texture | null;
+	alphaMap?: Texture | null;
+	envMap?: Texture | null;
 	combine?: Combine;
 	reflectivity?: number;
 	refractionRatio?: number;
diff --git a/src/materials/MeshMatcapMaterial.d.ts b/src/materials/MeshMatcapMaterial.d.ts
index f51b3b2d5c1968decb1721a332c8744611e7faae..c5426352781dde72b7bbdf1ea22abc7b600c37cf 100644
--- a/src/materials/MeshMatcapMaterial.d.ts
+++ b/src/materials/MeshMatcapMaterial.d.ts
@@ -7,17 +7,17 @@ import { NormalMapTypes } from '../constants';
 export interface MeshMatcapMaterialParameters extends MaterialParameters {
 
 	color?: Color | string | number;
-	matcap?: Texture;
-	map?: Texture;
-	bumpMap?: Texture;
+	matcap?: Texture | null;
+	map?: Texture | null;
+	bumpMap?: Texture | null;
 	bumpScale?: number;
-	normalMap?: Texture;
+	normalMap?: Texture | null;
 	normalMapType?: NormalMapTypes;
 	normalScale?: Vector2;
-	displacementMap?: Texture;
+	displacementMap?: Texture | null;
 	displacementScale?: number;
 	displacementBias?: number;
-	alphaMap?: Texture;
+	alphaMap?: Texture | null;
 	skinning?: boolean;
 	morphTargets?: boolean;
 	morphNormals?: boolean;
diff --git a/src/materials/MeshNormalMaterial.d.ts b/src/materials/MeshNormalMaterial.d.ts
index 0560ea4b62ad4d8bdfb6274795eb39e228b95298..965240c698caff3fac9bad64dfe1e045ba501257 100644
--- a/src/materials/MeshNormalMaterial.d.ts
+++ b/src/materials/MeshNormalMaterial.d.ts
@@ -5,12 +5,12 @@ import { NormalMapTypes } from '../constants';
 
 export interface MeshNormalMaterialParameters extends MaterialParameters {
 
-	bumpMap?: Texture;
+	bumpMap?: Texture | null;
 	bumpScale?: number;
-	normalMap?: Texture;
+	normalMap?: Texture | null;
 	normalMapType?: NormalMapTypes;
 	normalScale?: Vector2;
-	displacementMap?: Texture;
+	displacementMap?: Texture | null;
 	displacementScale?: number;
 	displacementBias?: number;
 	wireframe?: boolean;
diff --git a/src/materials/MeshPhongMaterial.d.ts b/src/materials/MeshPhongMaterial.d.ts
index cc312cd6e21a7f4426770c70ac100ce5744fe00d..afbda64751ba778234a7479ef1b2a57aa1069490 100644
--- a/src/materials/MeshPhongMaterial.d.ts
+++ b/src/materials/MeshPhongMaterial.d.ts
@@ -10,25 +10,25 @@ export interface MeshPhongMaterialParameters extends MaterialParameters {
 	specular?: Color | string | number;
 	shininess?: number;
 	opacity?: number;
-	map?: Texture;
-	lightMap?: Texture;
+	map?: Texture | null;
+	lightMap?: Texture | null;
 	lightMapIntensity?: number;
-	aoMap?: Texture;
+	aoMap?: Texture | null;
 	aoMapIntensity?: number;
 	emissive?: Color | string | number;
 	emissiveIntensity?: number;
-	emissiveMap?: Texture;
-	bumpMap?: Texture;
+	emissiveMap?: Texture | null;
+	bumpMap?: Texture | null;
 	bumpScale?: number;
-	normalMap?: Texture;
+	normalMap?: Texture | null;
 	normalMapType?: NormalMapTypes;
 	normalScale?: Vector2;
-	displacementMap?: Texture;
+	displacementMap?: Texture | null;
 	displacementScale?: number;
 	displacementBias?: number;
-	specularMap?: Texture;
-	alphaMap?: Texture;
-	envMap?: Texture;
+	specularMap?: Texture | null;
+	alphaMap?: Texture | null;
+	envMap?: Texture | null;
 	combine?: Combine;
 	reflectivity?: number;
 	refractionRatio?: number;
diff --git a/src/materials/MeshPhysicalMaterial.d.ts b/src/materials/MeshPhysicalMaterial.d.ts
index 07399cc9ef221da9c6df37d8a262bf7f3437b8fc..50aa34cc86145cfcc0f3cef72d7c66119870ba9e 100644
--- a/src/materials/MeshPhysicalMaterial.d.ts
+++ b/src/materials/MeshPhysicalMaterial.d.ts
@@ -15,7 +15,7 @@ export interface MeshPhysicalMaterialParameters
 	sheen?: Color;
 
 	clearcoatNormalScale?: Vector2;
-	clearcoatNormalMap?: Texture;
+	clearcoatNormalMap?: Texture | null;
 }
 
 export class MeshPhysicalMaterial extends MeshStandardMaterial {
diff --git a/src/materials/MeshStandardMaterial.d.ts b/src/materials/MeshStandardMaterial.d.ts
index a9c1eb1f4ce0d4458f67de64ec95d7193f5adfdb..53aef82a7967c4ac21fa8d6ca43ed8b02190af96 100644
--- a/src/materials/MeshStandardMaterial.d.ts
+++ b/src/materials/MeshStandardMaterial.d.ts
@@ -8,26 +8,26 @@ export interface MeshStandardMaterialParameters extends MaterialParameters {
 	color?: Color | string | number;
 	roughness?: number;
 	metalness?: number;
-	map?: Texture;
-	lightMap?: Texture;
+	map?: Texture | null;
+	lightMap?: Texture | null;
 	lightMapIntensity?: number;
-	aoMap?: Texture;
+	aoMap?: Texture | null;
 	aoMapIntensity?: number;
 	emissive?: Color | string | number;
 	emissiveIntensity?: number;
-	emissiveMap?: Texture;
-	bumpMap?: Texture;
+	emissiveMap?: Texture | null;
+	bumpMap?: Texture | null;
 	bumpScale?: number;
-	normalMap?: Texture;
+	normalMap?: Texture | null;
 	normalMapType?: NormalMapTypes;
 	normalScale?: Vector2;
-	displacementMap?: Texture;
+	displacementMap?: Texture | null;
 	displacementScale?: number;
 	displacementBias?: number;
-	roughnessMap?: Texture;
-	metalnessMap?: Texture;
-	alphaMap?: Texture;
-	envMap?: Texture;
+	roughnessMap?: Texture | null;
+	metalnessMap?: Texture | null;
+	alphaMap?: Texture | null;
+	envMap?: Texture | null;
 	envMapIntensity?: number;
 	refractionRatio?: number;
 	wireframe?: boolean;
diff --git a/src/materials/MeshToonMaterial.d.ts b/src/materials/MeshToonMaterial.d.ts
index 2dde05d55811bf1a3647a7ef6180a8f6c97b0794..6b7192a13fcd0892c3e89212c6c8bc544e64153a 100644
--- a/src/materials/MeshToonMaterial.d.ts
+++ b/src/materials/MeshToonMaterial.d.ts
@@ -2,7 +2,7 @@ import { Texture } from './../textures/Texture';
 import { MeshPhongMaterialParameters, MeshPhongMaterial } from './MeshPhongMaterial';
 
 export interface MeshToonMaterialParameters extends MeshPhongMaterialParameters {
-	gradientMap?: Texture;
+	gradientMap?: Texture | null;
 }
 
 export class MeshToonMaterial extends MeshPhongMaterial {
diff --git a/src/materials/SpriteMaterial.d.ts b/src/materials/SpriteMaterial.d.ts
index e58fe166b5ed09776c70aa74fd436f5d3fb3f237..c28d5a27331f02798577cb1608df3e8b46c939f5 100644
--- a/src/materials/SpriteMaterial.d.ts
+++ b/src/materials/SpriteMaterial.d.ts
@@ -4,7 +4,7 @@ import { MaterialParameters, Material } from './Material';
 
 export interface SpriteMaterialParameters extends MaterialParameters {
 	color?: Color | string | number;
-	map?: Texture;
+	map?: Texture | null;
 	rotation?: number;
 	sizeAttenuation?: boolean;
 }