Hi feirui445, you can modify the lighting options to get some different kinds of display effects.

There's some info on that here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=5222.1

and there's a plug-in here that you can install that gives you several presets to switch between:
http://moi3d.com/forum/index.php?webtag=MOI&msg=5222.43

- Michael