Artworx

Now, this filter gives 'painterly' effects, and has a wide range of possibilities from 'extremely subtle' to 'really very extremely unsubtle'. At the subtle end of the scale is a sort of soft, scratchy finish; at the other extreme we have messy blobs with (should you so wish) distorted colouration.

Now this filter has a really terrifying array of sliders. Don't panic - it also has a 'random' button that will do the thinking for you. If you're an inveterate tweaker, though, a brief run-down on the controls might be of interest:

Brush	You can select the type of brush to be used from a drop-down list. There are six to choose from, of which the 'fine lines' brush is the most subtle, and the fastest to render.
Stroke	Controls the length of the brushstroke.
Density	Controls the density of the brushstrokes.
Cohesion	Controls the spread of the stroke; low settings will cause each stroke to break up into a line of separate 'dabs' of 'paint'.
Angle	Sets the main angle at which the strokes are applied.
Twirl	Controls the amount by which the angle of individual strokes is varied from the basic 'Angle' setting.
Jiggle	Controls the amount by which individual 'dabs' are varied from the basic line of the stroke.
Spikes	Sets the number of strokes radiating from each point.
Variance	Sets the amount by which the colour of each stroke is randomly changed while painting.
Preserve details	Controls the way that the paint effect is applied to the image. At low settings, the effect is applied indiscriminately, and the final image will most probably be a mess (if you're lucky, though, it may turn out to be a visually pleasing mess). At higher settings, more of the original detail is preserved and the final image will make more sense.
Overall strength	Controls the mix of original/processed image. In effect, this also helps to preserve detail, though in a less subtle way.

	I'm no expert on flowers - see my comments on the Abstractor filter for confirmation - but I'm very fond of aquilegia, which is what this one is. I even recognised it without checking up in a reference book.
	This is the result with the default settings. The image acquires a reasonably subtle 'scratchy' texture.
	These settings were more extreme...
	... and this is a sort of 'Vincent van Gogh with a migraine as well as a sore ear' look.