Thank's I will try those ideas. As I was planning to do a little animation I don't think postwork is a god ide as it would be to much work and thats the reason for trying the volumetric materials. However, for a still image doing postwork wold probably be a lot faster and look a lot better than trying to do it with volumetric materials. Also several layers with semi transparent 'image planes' (dont remeber what they are called in vue) with a 'foamy' paint job could do it. Actually that could work in an animation to but then the foam would have to be animated and that would probably be more work than I have the time to put into it. Now i'm gonna go and check out that fountain.....