Carrelage effet marbre

SELECT s.id id, s.nom nom, f.nom_cm formato, s.tipomaterial tipid, s.subtipomaterial subid, tm.tipomaterial_fr tipnom, sm.subtipo_fr subnom, lower(t.nom_fr) tipol FROM vives_db.series s left join vives_db.serie_has_tipologia as st on st.id_serie = s.id LEFT JOIN vives_db.tipologia as t on st.id_tipologia = t.idtipologia LEFT JOIN vives_db.formatos f ON f.id = s.formato LEFT JOIN vives_db.subtipomaterial sm ON sm.idsubtipomaterial = s.subtipomaterial left join vives_db.tipomaterial tm on s.tipomaterial = tm.idtipomaterial WHERE 1 = 1 AND s.vigente = 1 AND t.idtipologia = 4 GROUP BY nom ORDER BY s.id desc, s.nom ;