Sprite Atlas adding on build size.

I'm creating a Sprite Atlas for a single texture which has sprites loosely spaced apart. When I generate the Sprite Atlas preview I can see the texture I made an atlas of is packed down densely, creating a much tighter and smaller texture.

However, when I build the project for Android the APK size increases for every Sprite Atlas. I've verified that Sprite Atlas packs are enabled for engine and builds under Preferences -> Editor. Also, when I untick "Include in build" the textures become empty (white) as expected in Play mode.

I'm using Anima2D on this project; not sure that could be part of the issue. The textures are not in the resources folder.

 

I was under the impression the atlas would replace the texture on build thus most likely reducing the build size. Does the original texture also get packed into the build along with the atlas?

 

Your latest comment helped me in connecting some dots, and I've managed to find reproducible cause.

If I use sliced parts of a single texture for both a Sprite Renderer as well Sprite Mesh(anima2D) then the file size increases.
EG: the texture contains a character as well their weapon, such as a projectile. I use anima2D to animate the character using Sprite Meshes. The projectile however is a separate prefab with a Sprite Renderer.

Issue can be remedied by making sure Sprite Meshes and Sprite Renderer images don't share the same texture. Have not tested if this holds true for other variations such Image and Sprite Renderer.

Thanks.

 

Looking at the Editor.log under
Build Report
Uncompressed usage by category (Percentages based on user generated assets only):

I see my sprite sheet as 44.1 kb 0.0% Assets/Textures/Units/GroundUnits/Extras/Bosses/SwampQueen/Base/SwampQueen_Base.png

as well the sprite atlas 3.7 kb 0.0% Assets/Textures/Units/GroundUnits/Extras/Bosses/SwampQueen/Base/SwampQueen_Base.spriteatlas

At one point the sprite atlases worked and the file size dropped about 40%, but out of nowhere they're not and the file size is large again. I've tried Sprite Packer mode Always Enabled and Enabled For Builds. I've tried using Pack Preview on the Sprite Atlas before building as well, just to be thorough. They're using crunch compression, 100% high quality.

I can try reproducing in a smaller project and uploading as a bug report.

Maybe worth noting, when the sprite atlases actually worked properly and reduced the file size I saw files with the .spriteatlas extensions being packed into the build beneath the progress bar; when they didn't work properly I do not see them.

 

It seems to be a rather common issue with SpriteAtlas.

According to the following post, reimporting the sprites and/or deleting the Library folder seems to workaround the issue.
https://answers.unity.com/questions/975082/both-atlas-and-individual-sprite-in-memory.html

A proper bug-fix would be appreciated

 

Neither of these have worked. Tried them in the past, and again just to be certain. Filing a bug report.

 

I'm unable to submit a bug report on the project I'm experiencing the issue. I excluded the Library and Builds folder and the upload progressed only 14% in 10 hours. I have 10mbps upload, the submission was taking way longer than it should have.

 

Hi guys
I have similar problem
I've created empty project with one sprite and put it in sprite atlas.
I don't use that sprite anywhere else except sprite renderer on the scene.

Build report shows that it includes both and sprite atlas and sprite

16.1 kb 0.0% Built-in Texture2D: sactx-128x128-ETC2-New Sprite Atlas-8e6d3ac5 ( contains icon_dolar.png )
0.7 kb 0.0% Assets/icon_dolar.png

Unity version is 2019.1b. , 2018.3.9f1

Any ideas?

 

Could you please submit a bug-report as described in this document:
https://unity3d.com/unity/qa/bug-reporting

It's important that you report these issues together with a reproduction project if you want them to get fixed. If you don't do it, it might be a long time until someone else reports them or until Unity Technologies find them.

After you submitted the bug-report, you receive a confirmation email with a bug-report Case number. You can post this Case number here (in this forum thread) for Unity staff to pick up, in case they see it.

 

Done.
The ticket number is : 1139877

 

We seem to be seeing this issue in Unity 2019.2.5. Any insights to why that would be?

 

Is this fixed in newer Unity versions? We have this issue in 2019.1.14, but we can't update because it breaks our project.

 

After tried many times. I finally found out as long as that image/sprite that include in the sprite atlas, not in the Assets/Resources folder then those image wont be include in the build.

----------------------------------------------------------------------------
BEFORE
Build Report
Uncompressed usage by category (Percentages based on user generated assets only):
Textures 14.2 mb 48.1%

Used Assets and files from the Resources folder, sorted by uncompressed size:
1005.0 kb 1.5% Assets/Resources/Image/SpotTheDifferentImage/Black Panda.png
1004.9 kb 1.5% Assets/Resources/Image/SpotTheDifferentImage/Panda.png
1004.9 kb 1.5% Assets/Resources/Image/SpotTheDifferentImage/PENGUIN.png
382.4 kb 0.6% Built-in Texture2D: sactx-0-2048x2048-Crunch-SpotTheDifferent Atlas-6a3bf6a2
171.1 kb 0.3% Built-in Texture2D: sactx-1-2048x1024-Crunch-SpotTheDifferent Atlas-6a3bf6a2
----------------------------------------------------------------------------
AFTER
Build Report
Uncompressed usage by category (Percentages based on user generated assets only):
Textures 553.5 kb 3.4%

Used Assets and files from the Resources folder, sorted by uncompressed size:
382.4 kb 0.7% Built-in Texture2D: sactx-0-2048x2048-Crunch-SpotTheDifferent Atlas-6a3bf6a2
171.1 kb 0.3% Built-in Texture2D: sactx-1-2048x1024-Crunch-SpotTheDifferent Atlas-6a3bf6a2
6.2 kb 0.0% Assets/Image for Package/Black Panda.png
6.2 kb 0.0% Assets/Image for Package/Panda.png
6.2 kb 0.0% Assets/Image for Package/PENGUIN.png

 

Hi All I have got a solution as I was getting a size of 2 MB as sprite atlas as I was not using any atlas
my Editor Log was showing
2.0 mb 1.2% Built-in Texture2D: SpriteAtlasTexture-New (Group 0)-2048x1024-fmt47

Atlas was made because some of my sprites were having a packing tag of New which is written after SpriteAtlasTexture
This Packing Tag can be found right below the Sprite Mode when you change the texture type to sprite 2d and Ui.

Just null the packing tag and make sure none of your sprites have any packing tag to ensure no sprite atlas made by unity

 

OMG I spent 2 days scratching my head because of this "duplication" issue.
Turn out, I ignored its size.
The "sprite source" assets appearing in the Build Report has much smaller size than the original one. So they're not actual sprite sources, but only sprite data needed along with the real texture packed in the atlas.
Thank you for clarifying.

 

I'm kind of late to the party, but what if I have a ScriptableObject asset in my Resources folder that holds a reference to a Prefab that contains Sprites that are packed in a SpriteAtlas, will those Sprites automatically be included in the build?

 

Does "some other asset" include Image component? I have a sprite that I use both in SpriteRenderer and UI's Image component. Would this make that sprite to be included in the build separately from the sprite atlas?

 

No the source texture is not set in any material. No it is not. In my build it shows that there are spriteatlases, the image files that are supposed to be in the atlases. There are duplicates of those image files with different sizes. And then there are large files that are in unknown category, which I found them to be in Library/AtlasCache folder. I cleaned that folder rebuilt my project but they still appear in the build report. Why are cache files are included in the build?

 

@Venkify
I am using a scriptable object where I am attaching my sprites.
I have created a sprite atlas out of these sprites but I am seeing that these files are still included in the build report.
is it because of scriptable objects which are still linked with individual sprites?
Is there any way we can use a sprite atlas with scriptable objects?

 

I have theme implementation in my game. This implementation is using scriptable object of each theme where we attach theme-specific sprites. At runtime, we use this scriptable object to get the correct theme sprite and update the UI.

Now, I want these individual sprites to be packed in a sprite atlas. This will help us in reducing our app size.
Atlas creation is simple but I am struggling to figure out how can I give this atlas to my scriptable object which has all the individual sprite fields.

Here is my current implementation. I want to use sprite atlas instead of this individual sprites.

 

Currently at latest Unity 2022.3.22f1 LTS, the sprite atlas is still completely unusable that sprite atlas force to set Compression to None to fix bad sprite quality issue which make the game build size extremely high which totally unacceptable. Officially really need to fix it asap since the issue is still at there way too long time.

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