ZenBrush, colored with digital watercolor in Rebelle, then alpha/color varigation added in Photoshop. Upscaled in PhotoZoom. Image links to 2400 x 3600 (8.64 MPixels) original, free for personal use.
Started as a test of Rebelle software watercolor effects (I'm impressed), ended using Corel Painter, Dynamic AutoPainter, FilterForge, a Processing image bomber, and Photoshop. Tap or click thumbnail image for larger resolution image, free for personal use.