destroy

Frees the provider itself (cached materials survive unless destroyMaterials was called).

Frees the provider itself (cached materials survive unless destroyMaterials was called).

Frees the provider itself (cached materials survive unless destroyMaterials was called).

Frees the provider itself (cached materials survive unless destroyMaterials was called).

Frees the provider itself (cached materials survive unless destroyMaterials was called).