[1] His first solo exhibition at the Glynn Vivian Art Gallery in Swansea in 1920 contained, among other works three pictures related to the local mining communities and proved a turning point in his career.
[2] That year he was also given a one-man exhibition in the Dorothy Warren Gallery in London, where his industrial subject manner was embraced by left-leaning critics in the wake of the General Strike.
[2] During the General Strike, Walters painted Welsh Funeral Hymn showing four naked youths, marked with stigmata, on a coal tip with a choir and chapel in the background.
His experimentation with producing "double vision" paintings became almost an obsession and an exhibition of November 1936 at the Coolings Gallery, London of these works was not a success and not one of the twenty- two pictures was sold.
[3] Walters wrote an essay on his ideas, The Third Dimension, and continued to champion the theory, without any success, for the rest of his life.