[5.3.1] meta file size is multiple growing

• [rect count] => [meta file size]
• 10 => 2kb
• 20 => 5kb
• 30 => 141kb
• 40 => 285kb
• 50 => 600kb
• 60 => 999kb
• 70 => 1498kb
• 80 => 2129kb
• 90 => 3301kb
• 100 => 3491kb

In my real project, on Unity 5.2.3p3:



After sprite editor on Unity 5.3.1p1/5.3.1p2:



And my computer getting slower and slower.
Even some computer has been unable to open the project.
This problem is very troubled us.
Hope you can fix as soon as possible.
Thank you.

 

By the way, if you open a new project on 5.3.1, this problem will not necessarily happen. But if you upgrading from previous version, a big chance of this problem will occur.

 

Have you looked into the meta file to get an idea which areas are growing there? Also, you could file a bug report with a small repro case.

Finally, a work around might be to use PNG or TGA instead of PSD files for now. (Save the PSD files somewhere else and export them into your Assets folder as PNG).

 

You could refer to this post:
http://answers.unity3d.com/questions/25948/difference-between-using-psd-and-png-files.html

 

I think the link is misleading. The question in the link is about differences in the deployed application. The OP has a problem with the size of the *.meta file, which has nothing to do with the final application.

 

Still occur on 5.3.1p3...

 

Hi people out there, Im having the same problem as sheng319.

My project was migrated from unity 4.6.0f1 to unity 5.3.0f4, and I started noticing an annoying freeze every time I do any modification to an atlas through the sprite editor tool. Then I realized that the meta file was too large and that it was probably the cause of my freezes (some times crashes to desktop).
-So, I created a new proyect, then import my texture (atlas).
-Unity creates a meta file of 1KB
-Modify the import settings: TextureType=Sprite(2D and UI) and Sprite Mode = Multiple
-Unity meta is now 143KB (338 sprites)
-Make a backup of this meta file
-Modify the name of one of those sprites inside the Sprite Editor window
-Unity freezes for 1 min aprox after I press the apply button
-Unity meta is now 132.5MB
Then I compare the meta file with the one I backed up earlier (using a text editor) and then I notice that the difference is +4.4 million lines of text (5973 lines in backup, 4417213 lines after the sprite renamed)
So I want to know if this is a bug and if someone knows how to fix it please.

NOTE: the lines that seem to grow up are the ones that concern to the tag "outline" (whatever this tag/property means, cause it wasn't in unity 4.6.x).

NOTE 2: I've attached the txt files with the same text as the meta file before renaming the sprite and another file with the first 6000 lines of the meta file after renaming the sprite (I cant upload the file with +4.4 lines cause of the size).

 

Hi there. Any news on this fix? I've just check my sprite page .meta files and they are also full of seemingly superfluous "outline" data to the point that the sprite editor is now just hanging.

E.

 

Hi there,

Just downloaded the 5.3.2 update and it looks like this issue is still present? Could you please let us know if there is a fix imminent?

E.

 

Hey thanks!

That would appear to have done the trick - the sprite editor is no longer hanging when the apply button is pressed and the sprites are behaving as expected. I checked out the associated meta file and say that there is still a fair bit of "outline" data in there - just out of curiosity, what is "outline", what is it derived from and and is it necessary to have it?

Thanks again, E.

 

Hi. I got near all of my textures atlases hit by this issue. I cant reset them because its a lot of work. Can i write script which will open metafile and delete this outline data which increase filesize or it is a needed part of spriteatlas? What will happen if i just delete all of this outline data?

Code (CSharp):

1.  
2. outline:
3.       - - {x: 3.5, y: 33.5}
4.         - {x: -40.5, y: 33.5}
5.         - {x: -40.5, y: -11.5}
6.         - {x: -18.5, y: -33.5}
7.         - {x: 16.5, y: -33.5}
8.         - {x: 32.5, y: -22.5}
9.         - {x: 40.5, y: -3.5}
10. ....
11. ....
12.  

 

I wrote simple app to fix meta file size. Put your metafiles in to folder with metafilefix.exe, then run metafilefix.

 

Thanks! You've saved me alot of time.

 

Thanks DenisM, your Script saved us a lot of time too!
We defined around 100 sprites out of an gui texture atlas for all our gui elements.
The meta file had a size of around 102MB! What a bug! Now its back to normal, around 70kB. Before, I couldn't load the scenes anymore.
It was also not an option, like it was told us from unity officials, to rearrange all those sprites by hand...