J'ai resolu le probleme avec ses links, faites moi savoir si cela fonctionne chez vous.....en anglais seulement ...mais facile a utiliser
http://natsuki.mplayerhq.hu/~reimar/xwahacker.exe
http://natsuki.mplayerhq.hu/~reimar/fixedclear.bat
Put them both in your XWA installation directory, and double-click the bat file (this applies the Z-buffer fix already quoted here).
you can also use these batch files to switch between the original 16-bit and 32-bit rendering mode, maybe it makes it possible to use anti-aliasing for you:
http://natsuki.mplayerhq.hu/~reimar/32bitmode.bat
http://natsuki.mplayerhq.hu/~reimar/16bitmode.bat
You can then delete (or move, or whatever) all those files again.
probleme ???? fait le moi savoir...