I made a huge project, wanted to reduce file size from 1.3GB to below 1GB. Compressing did not help. I removed objects from scene. Also textures. I then realized, the file size even was the same when I delete ALL objects. Why?

Download of sample: https://ufile.io/0cc23

Before deleting all: 1.2GB, after: 1.1GB. File size does not shrink

  • $\begingroup$ Are you sure you actually removed the object data? Do they show as having zero users before closing? Don't they have fake users set up? They may be in use elsewhere in another scene or object. $\endgroup$ Nov 20 '16 at 15:06
  • $\begingroup$ I uploaded a sample. I don't know if all is removed. It seems not. But in the outliner there is nothing to find. No objects in outliner. All deleted. Still over 200MB. $\endgroup$
    – Nasenbaer
    Nov 20 '16 at 15:11
  • $\begingroup$ Interesting. Did you try File/External Data/Unpack All Into Files? $\endgroup$
    – lbalazscs
    Nov 20 '16 at 17:48
  • $\begingroup$ Yes. File > External Data > unpack all. No success. That is the file I've uploaded as sample. $\endgroup$
    – Nasenbaer
    Nov 20 '16 at 23:07

Your scene is far from empty (couldn't be any other way), there are plenty of objects there stored inside groups.

Try switching your outliner to Group view and you will find plenty of group definitions you can insert into your scene, with lots of high poly objects stored in them.


Not sure exactly how they are stored or where they come from, but they are causing your big file size. Will try to investigate further.

If you go into the Outliner > Datablocks view you can also see lots of data stored inside your file, like images, objects, groups, brushes, etc.

enter image description here

To actually delete data, select the (un)desired groups in the Outliner under Group mode, Right Click over the group name (not the icon) and choose Unlink option.

You have to save, quit file, close Blender and then reopen the file again, for actual data to be gone. Save again and file size should be reduced.


Ok, only way I figured out how to actually reduce file was to go into the Outliner, after unlinking all groups as described above, switch to Blender File mode, go into the Mesh category and manually select everything and erase it with Right Click > Delete. This reduced file size to about 5Mb

Due to the large amount it is probably easier to just select everything with A and deselect all other categories before erasing

  • $\begingroup$ With your animated images (how did you do that?) I fully understand. I was on "all objects" and I still do not understand why blender does not present it that way. Great to see the "Groups" solution. Thank you $\endgroup$
    – Nasenbaer
    Nov 21 '16 at 6:48
  • $\begingroup$ I am still unable to reduce file size to nearly zero. I can see the items but not delete them. $\endgroup$
    – Nasenbaer
    Nov 21 '16 at 7:10
  • $\begingroup$ I forgot to add that, to actually get rid of it you have to unlink the groups from the outliner, answer updated above. $\endgroup$ Nov 21 '16 at 7:22
  • $\begingroup$ GIFs are captured with ScreentoGif $\endgroup$ Nov 21 '16 at 7:25
  • $\begingroup$ I added an animation. Problem still not solved. $\endgroup$
    – Nasenbaer
    Nov 21 '16 at 9:02

Try deleting lighting cache. In 2.8, click on little camera icon, find "Indirect Lighting" section, in there you can click on "Delete Lighting Cache".

If you hover over "Delete Lighting Cache" it will tell you how much space the cache is using.


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