求教渲染问题?关于UG NX的.

我的UG NX里面的TIFF图板一片空白,没有图库的？为什么？艺术图像里面也一样，是否要设置什么参数？请高手指点，谢谢！

有人能答吗？::?::?

::?::?::?::?

应该是设置的问题吧:The remainder of the variables are defined in this file and are divided  
#  into the following sections:
#
#     DISK FILES        - variables relating to *.ugf files that are used.
#     MODELING          - variables relating to modeling
#     MACHINING         - variables relating to machining products
#     CGM               - variables relating to the CGM product
#     ERROR and HELP    - variables relating to error and help files
#     USER FUNCTION     - variables relating to user function
#     MISCELLANEOUS     - miscellaneous variables used by unigraphics
#     USER EXITS        - variables relating to user exits.
#     SMD               - variables relating to sheet metal design
#     ROUTING           - variables relating to the UG/Routing product
#     GRIP BATCH        - variables relating to grip batch
#     DISPLAY DRIVERS   - variables relating to the display drivers
#     PLOTTER           - variables relating to plotter configuration.
#     TRANSLATORS       - translators & process specific applications.
#     SCENARIO          - variables relating to the SCENARIO product
#     MACHINE DEPENDENT - variables with  platform specific settings.
#
#  Some variables do not need to be set, the code has a default value.  These
#  variables will be commented out using the "#" sign.  If you assign a local
#  value you must uncomment the line.  

高手出手指点一下啦？盼望指教！