把檔案存成.ma
然後用文字檔打開，把檔頭有MAYA 2008的都改成MAYA8.5

如果沒有動用到新版本功能的部分，基本上都可以在舊版本正常使用。
如果有用到新功能的話請自求多福

I am still using Maya 6 & Photoshop CS.. haha
I just feel more comfortable this way.
The company that I work for is still using Maya 4 + custom maya tools,
which they find out it's more stable on Maya 4. In game, we don't need
many new features from the new maya.

Like what innison said,
In your case,  you can export the mesh from the new Maya
and import to the old Maya. It works for all versions of Maya.

小弟最近剛開始學maya，最近遇到了關於maya2008與8.5版版的檔案問題。
小弟學校使用的是8.5，而家中使用的則是2008版本。
我在家中作好的檔案 似乎無法在舊版本中讀取。

請問各位大大， 我該輸出成何種格式呢?