" Sprite outline generation failed - could not read texture pixel data." - When building the game...

Sprite outline generation failed - could not read texture pixel data. Did you forget to make the texture readable? pops up whenever I build the game. The consequences are that some of the 2d physics I have in said game has broken and I'm not sure how I would go about fixing it

 

Is this the only way this error can be thrown? I have meta files enabled and I searched for the string: spriteGenerateFallbackPhysicsShape: 0 in my project. I got one hit and enabled physics shape for that texture (even though it wasn't even used in my scene). Even with Generate Physics Shape enabled for every sprite in my project, I am still getting the error.

 

For future me: This can happen if you have a tile on a tilemap that's linked to a blank sprite (likely because the sliced texture had blank regions in it), with a tilemap collider, in a build only, when trying to instantiate from a prefab.

Best guess why this happens - sprite packing somehow breaks things.

 

This is exactly what's happening to me. Did you find a workaround?

Edit: nevermind, one of the *thousands* of sprites in the project didn't have Read/Write and Generate Physics Shape enabled. Hey @ChuanXin (mentioning you because you're here, sorry if this is not your area!) would it be possible to add the name of the troubling texture to the log message? It could save some time to other devs in the future!

 

I have this in a webgl, I have no idea what sprites are causing the error. How do you enable "Generate Physics Shape" en masse? I have lots of sprites scattered across my project(it's not my project, just one I'm working on... hence why it's disorganized lol) I just got this error recently... I didn't add any new sprites... i did, however, duplicate a couple tlesets and slice them as "multiple" if that could've caused it?

 

I ended up making a custom editor script that looked for every single sprite in the project and listed all the sprites that didn't have "Generate Physics Shape" option ticked, so it was easier to find the problematic one. I don't think enabling that option comes at no cost, so you should only enable it where it's necessary.

Sadly, I'm no longer part of that project and don't have the script I used to share.

If I recall correctly, I used AssetDatabase.LoadAssets with "t:Texture" as parameter to save every texture in the project to an array. Then I just looped through that array and printed the name of the textures with the "generate physics shape" (I don't remember the real name) property set to false. You could also set the property to true there, but again I'm not sure what the caveats would be.

I hope I was useful!

 

Ah, I figured I had to do something along those lines. I wasn't 100% sure on how though, so thanks! I'll try that