>>I make all my models in Autocad and I am very accurate and fast with this program. Do you think I can achieve this level with Max? How I can start to model in Max?<< Hi Gonzalo, The answers are: yes and slowly! :) I've known many users who have switched to Max/VIZ modeling when they learn how it works. As you see, it's very different from CAD and requires a different approach, but the advantages are much higher efficiency and flexibility. Where does visualization fit into your workflow; conceptual, design e or marketing? The earlier it is used, the more productive it can be usually. Both programs are for entirely different purposes and while there can be some productive overlap, it requires that you know both programs very well to avoid wasting time and resources. I tell people that CAD is a mechanical pencil and Max/VIZ are crayons to illustrate the intent of the programs. Any uses in between require compromise. There is no "right" answer, but I'd recommend you learn as much as you can about Max and then make a decision on the mix that works best for your office. Don't be afraid to separate the presentation from the construction documents. The "one big happy software family" was cooked up by Autodesk marketing and the theory only works to a certain point if your goal is to make money with Max/VIZ. To learn Max/VIZ try to pay more attention to understanding the underlying concepts of the software so you can take advantage of the Modifier Stack, Cloning, or model optimization, for example. Sorry to make you read so much, Gonzalo, but this is a topic I'm very interested in and take every chance to vent! :) By the way, "you know when your max model is finished when there's nothing left to remove". Thanks Ted