Greetings Pepijn,
I wanted to let you know that some of the things you are asking for will be available in the IDL 6.1 release this summer. This will include the ability to save and apply "styles" to control the properties of a visualization, the ability to record and run macros from the command line, and additional command line control over existing iTools.
With regards to your question about buffering: This can be done (on UNIX) by running a CRON job by using a virtual frame buffer. For information on this, see the following tech tip on our Web site:
http://www.rsinc.com/serv...echtip.asp?ttid=2382
I hope this helps!
Regards,
Stephanie Staley
IDL Technical Product Manager
Research Systems Inc.