Attached Link: http://www.renderosity.com/viewed.ez?galleryid=66445&Start=1&Sectionid=0&filter_genre_id=0&Form.Sea

As Aldaron said, make them positive and group. Grouping for itself doesnt solve all the problems. Experiment also with Fuzzy Factor & Quality. I discussed this subject in 3DCommune Bryces forum a long time ago, is sequence to my pic "The Monastery" (see link).

Fernando