void set_texture(Tag, const Texture *, const Sampler * = 0);
Tag get_texture_tag(const std::string &) const;
DEPRECATED void set_texture(unsigned, const Texture *, const Sampler * = 0);
void set_texture(Tag, const Texture *, const Sampler * = 0);
Tag get_texture_tag(const std::string &) const;
DEPRECATED void set_texture(unsigned, const Texture *, const Sampler * = 0);