In the 1970s his paintings became more textured .
In the 1960s , English painter John Hoyland 's Color field paintings were characterised by simple rectangular shapes , high - key color and a flat picture surface .
In the 1970s John Hoyland 's paintings became more textured .
In the 1960s , English painter John Hoyland 's Color field paintings were characterised by simple rectangular shapes , high - key color and a flat picture surface .