Cool thanks hroch I'd be happy with anything you think looks good & is easy to do.. I'd planned on using the Civ4 Modern Farm graphics for regular Farms, then having a version with the crop plots (crops_w.nif) containing Crop Circles. It could probably be a simple reskin, but if you think it would look best slightly raising/modifying the nif texture to be more noticeable (or even cut into Wheat) that could be awesome tooIt is important, what is your idea. Do you want circle or pattern in Wheat, or model, which replaces the wheat, or the model should be in a different field than corn, or just a simple flat model and the circle or shape appears only by texture?
As game resolution would suggest the last option, but not against a more complex solution