Update mixMaterial.ts

materialsLibrary/src/mix/mixMaterial.ts

@@ -171,7 +171,7 @@ export class MixMaterial extends PushMaterial {
 
         // Textures
         if (scene.texturesEnabled) {
-            if (this._mixTexture1 && !this._mixTexture1.isReady()) {
+            if (!this._mixTexture1 || !this._mixTexture1.isReady()) {
                 return false;
             }
 
@@ -180,7 +180,7 @@ export class MixMaterial extends PushMaterial {
             if (this._mixTexture2) {
                 defines.MIXMAP2 = true;
             }
-            if (this._mixTexture2 && !this._mixTexture2.isReady()) {
+            if (!this._mixTexture2 || !this._mixTexture2.isReady()) {
                 return false;
             }