I took this photo somewhere in Texas! I love landscapes and Texas! I drew this with a Platinum fountain pen. It has an extra fine nib. I am using a landscape 8.5x5.5 sketchbook.
I am convinced the type of brush you use make a difference. I love the splotchy look. I am using a cheap joes pseudo sable brush in sizes 12 and 6. It holds the color and water.