Thank for your help i will try this evening. I'm just editing my post to say thank you to C K ! it work fine. Now i'm just search tuto for make my own textures of apron, land etc because in France we haven't rights for satellites images like USA... And also i would like to know why i'm obliged to edit .pol file and duplicate the file to edit it. (if i make a new file with Textedit and rename it, the file doesn't work in WED) I'm on mac. I am very intersting to learn how to make a scenery to release it in .org (for free) Xplane 10 is incredible...