bool set_texture(const Texture *);
const Texture *get_texture() const { return texture; }
bool set_texenv(const TexEnv *);
const TexEnv *get_texenv() const { return texenv; }
bool set_texgen(unsigned, const TexGen *);
const TexGen *get_texgen(unsigned);
bool set_texture(const Texture *);
const Texture *get_texture() const { return texture; }
bool set_texenv(const TexEnv *);
const TexEnv *get_texenv() const { return texenv; }
bool set_texgen(unsigned, const TexGen *);
const TexGen *get_texgen(unsigned);