you can 'watermark' meshes, and even morphs if you are patient. you can move vertices around to actually spell your initials if you so wish, or whatever you like. you can do it in as inconspicuous a place as you like - like between the toes for example. but while there are many ways to mark images and meshes, are they worth it? not really. its not like most modellers and texturers do not keep hundreds of megs of WIP images/meshes that the infringer cannot reproduce (especially unmerged materials, NURBS polysurfaces, etc). proving that a mesh or a texture is yours isnt much of an issue - the issue is having action taken on your evidence. as for recognising the mesh? hah! any modeller or texturer who has spent days slaving over a mesh/texture can recognise it in a heartbeat, even from a partial glimpse. i recognised the last 3 infringements of my products from the thumbnail in the marketplace.