So this is not a realist painting, but an untouched screenshot from Second Life -- yes it is, yes it is:
The artist known as Whiskey Monday sent it to me, because it's the original of this image she posted on her blog right here, which is much more dramatic, because she ran it through the Photoshop paces. But don't you agree, the original looks great too? This is because she's not using the standard Second Life viewer to take the screenshot. For as she tells me:
"Firestorm introduced Vincent Nacon’s alternative cloud maps in this last release. There are four cloud tga files to choose from, and they're far more realistic and robust than the normal viewer clouds. Ziki Questi did a great blog post with examples of each type of cloud.
She's using these clouds to create a new series which is on-view in-world soon: