void csg_emission(csg_object *o, float r, float g, float b);
void csg_color(csg_object *o, float r, float g, float b);
void csg_roughness(csg_object *o, float r);
void csg_emission(csg_object *o, float r, float g, float b);
void csg_color(csg_object *o, float r, float g, float b);
void csg_roughness(csg_object *o, float r);