The Flemish painter Petrus Christus correctly used geometric perspective, something that Van Eyck and Van der Weyden had not achieved. His work is very small.
Portrait of a Carthusian by Petrus Christus, 1446. The MET, New York. Open Access, Public Domain.
A Goldsmith in his Shop by Petrus Christus, 1449. The MET, New York. Open Access, Public Domain.
Head of Christ by Petrus Christus, ca. 1445. The MET, New York. Open Access, Public Domain.