Property<Vector3> normal;
Property<float> metalness;
Property<float> roughness;
Property<Vector3> normal;
Property<float> metalness;
Property<float> roughness;
void set_normal_map(const Texture *);
void set_metalness(float);
void set_metalness_map(const Texture *);
void set_normal_map(const Texture *);
void set_metalness(float);
void set_metalness_map(const Texture *);