I have a simple SpriteAtlas: "UIAtlas" which is located in the Resources folder. It points to a folder "UIAtlas" which contains my menu textures.

All of my batching is working perfectly, everything is being batched, because of the atlas.

When I build an iOS version, in the Editor.log I can see this:

Build Report

Uncompressed usage by category:

Textures 299.5 mb (30%)

Meshes 0.0kb (0%)


Used Assets and files from the Resources folder, sorted by uncompressed size:

16.0 mb 1.6% Built-in Texture2D: sactx-2048x2048-Uncompressed-UIAtlas-312aba98


345.3 kb 0.1% Assets/Resources/UIAtlas/medal.png

... more entries like this ...

Please notice that this texture (medal.png), along with the other textures belongs to this atlas, which is already included in the build-executable.

I feel this is wrong. If I pack things, they should be packed into that texture and only that 2048x2048 texture should be in the build, right?

What's wrong here?

  • \$\begingroup\$ Does this still happen if you move the source file out of the Resources directory? \$\endgroup\$
    – DMGregory
    May 18 '19 at 23:00
  • 2
    \$\begingroup\$ Turned out that this is the issue. I found a post on Unity forums, made by one of the employees, explaining that any graphic in both the Resources folder and the SpriteAtlas will be duplicated. I'll find a link and put it here. Thanks, you were right ;) \$\endgroup\$
    – Jacob
    May 19 '19 at 7:26
  • 1
    \$\begingroup\$ Ooh, can you summarize that post as an answer here? \$\endgroup\$
    – DMGregory
    May 19 '19 at 7:27

Here's an official answer.

Any assets inside the Resources folder (including Sprites and Atlases regardless of being packed) will always be exported. This is by design.

So when we make a SpriteAtlas with some textures, and put in it the Resources folder, it's a total mess. I did it initially cause I wanted to unload assets and load them dynamically.


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