G5, Art Filters & raw
I have my G5 set to shoot raw.
However it was my understanding that when you selected an Art Filter (or shot in iA mode) that the camera defaulted to jpeg.
I have the G3, and it's my understanding from the manual that when you set your camera to Raw, the "Artistic" settings are not available. You need to be in JPG mode for those to work.
Everything in moderation, including moderation.