Golden Acrylics makes some wonderful ‘open’ paints with built-in drying retardants. They don’t stay mixable anywhere as long as oil paints do, but they don’t dry instantly on canvas (like regular acrylics might, especially in Arizona summers.) This makes the Open Series really fun as plein air tools, along with a pack of canvas paper and a little easel.
‘Horizon’ is a quick sketch of a rainstorm I did a few years back, down on the plain between South Mountain and the Estrella Mountains, along Riggs/Beltline road.