I would use the Photoshop render for a 'cloud' background using the colours already in the existing one (highlight colour and lowlight colour), put it on top of the existing one and then reduce the cloud opacity until the two merge suitably. I've never tried this before, but my mind says it should work and look good here. (",) btw, it doesn't suck. It may look like some strange cross between a triffid and a cabbage, but it doesn't suck....