With a hammer.lamart wrote:And how I clean the IP ?
You don't clean an IP. By a clean IP he means that the license the creator has put on the asset needs to be okay for us to use. GPL is the most common official one we can use, but there are some other licenses. The creator might also have no idea about licenses, so he would just add a line to his readme file saying something like: "Feel free to use this in any way you like" or something.
When you make a model from scratch, you should add some information to it. What can people do with your model? Can they modify it? Can they freely use it in their own projects? Some artists are not comfortable with putting their work out there. Other artists would like others to build on it. I don't know what you want to happen to your work, but you make that choice for the assets you have created.
Unfortunately, OpenMW's example suite can't just use any asset that is found online. We want to be sure we respect all the artists out there and comply with their wishes as well as the law. We need to be allowed to freely use these assets and spread them, which is what he meant by "clean asset". That means that if you create an asset for the example suite, you would have to give other people permission to use it for their own project. (We're working with the philosophy that we are giving back to the community and the community is giving back to us. As long as we all freely share our assets and our skills, everyone will be better for it - sharing is great and allows everyone to be creative and make newer and cooler stuff.)
In short, if the artist doesn't say anything about permission to use and spread those assets, it's better to be safe and not use them at all.