Painting - Gemälde
Drawing - Zeichnung
Picture - Bild
You were thinking of Bild, I guess?
Mahlen
painting = Malen
a painting = Gemälde
drawing = Zeichnen
a drawing = Zeichnung
Mahlen is grinding, you mean Malen
Fixed. I should have gotten a clue when I spelled Gemälde without the extra h.