[Bf-committers] blend files differ every time they're saved

[Jonas Eschenburg]

Ok, I think I can answer my own question. I failed to notice that there 
is a "compress file" checkbox when saving. So I ended up saving 
compressed files, which of course differ very much.

Thanks anyway!
Jonas

Am 16.08.15 um 19:08 schrieb Jonas Eschenburg:
> I noted that repeatedly saving the same project produces very distinct
> files.
>
> Just try the following: Open some blend file. In my case, it was the BMW
> bemchmark from Blender's demo files. Save it twice using either "Save
> Copy" or "Save As". Then use LZMA compression (xz) to compare:
>
> $ ls -l bmw*.blend
> -rw-r--r--  1 jonas  wheel  3150509 16 Aug 18:45 bmw1.blend
> -rw-r--r--  1 jonas  wheel  3150587 16 Aug 18:45 bmw2.blend
> $ cat bmw1.blend | xz -9 | wc -c
>    2975856
> $ cat bmw1.blend bmw1.blend | xz -9 | wc -c
>    2976400
> $ cat bmw2.blend bmw2.blend | xz -9 | wc -c
>    2978000
> $ cat bmw1.blend bmw2.blend | xz -9 | wc -c
>    5585604
>
> It seems that most of both files is completely distinct. I'm not only
> trusting in xz here, I even wrote my own binary comparison tool. FYI, I
> disabled file compression in Blender User Preferences->File->Compress File.
>
> Could somebody give a hint on what is happening here?
>
> Jonas
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