The protection of the intellectual property of the 3D models can be a serious issue for every 3D modeler. It sucks when your model is posted for selling at a webside without your consent with a juicy price and you're gaining NOTHING from it. Some 3D artists are adding watermarks to their models, which can be easily removed by an amateur with a free surface modelling program (Meshmixer, Meshlab etc.). But there is an easy solution for this injustice - an invisible watermark. On Watermark3D you can add such watermark, incorporated into the mesh of your 3D model itself, which is hard for removing and can be checked on the same website during an intellectual property dispute. For the removing of the watermark you have to remesh the whole model, which will decrease the overall quality of the model substantially. I hope that I'll spare you the pain, which I experienced recently. Enjoy