Joerg, don't feel guilty about selling. You have an excellent reason to sell (contribution to Verdie's medical expenses) and when you sell something in the marketplace, you are selling it for both personal and commercial use, which is the primary reason why I buy things here - so that I can use them in my commercial images and projects without any hassles. What you describe (150 shaders, 30 atmospheres) is worth way more than $5, or even $10 for that matter. So please, don't feel guilty. You would actually be doing some of us a favor AND would be helping a wonderful person (Verdie) in the bargain. Kate