Hi David, Yes, Christmas was great - thanks for asking. Building objects for wind usually involves adding bones to them. It's not ideal but you can get it work. I haven't tried grass before. A single blade wouldn't be a problem but a field might be. A coupld of years ago, Wayne Kilgore did a great example with Anything Grows using an animated texture map to "blow" the grass. In his example, a bumble bee was flying low over grass blowing it down as it moved. So, there are other options. Mark