>> If POV-Ray "sees" there's a file with post-process data, it can ask the
>> user if he really wants to re-render or not.  Also, an "archival" mode 
>> (POV-Ray
>> gives an automatically numbered name to its output) would avoid any
>> dangerous overwrite (and allow to easily keep a record of an image's 
>> evolution,
>> which is currently tedious).
> 
> That's just a GUI detail. Well, you *better* aren't thinking on adding 
> "ask the user" to the rendering backend...

That would logically be done at front-end (CLI or GUI) level.

Fabien.

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