Exporting with texture-packer : no mix in Unity / pink box

nouk66

Hello everyone !

I'm doing an export with texture packer (with 2 separated folders) but once I open it in Unity, I got pink boxes instead of normal textures.
Exporting basically my animation works, so it's not a .spine problem I think.
I heard it could be a problem of differents names between the atlas and the skeleton but when I try to have same names (example : skeleton.atlas, skeleton.json, skeleton.png, skeleton.png2, etc...), the mix (= the animation) is empty in Unity.
this is the differents stages of my export :

first I export the skeleton, "power of two" checked in my settings (otherwise I have no mix in Unity (?)).
I delete all the .png
I use texture packer, exporting a folder named "x" then a folder named "y"
Then I loose my textures in Unity.

I've surely forgot something, so if you know what it is, please tell me. I tried a lot of differents settings and nothing work : (

thanks !

Pharan

(1) "Power of two" is only relevant for specific platforms (some Apple devices, some old graphics cards, etc...).
It should be fine either way but I'd recommend that you keep that checked if you're doing cross-platform stuff.

(2) In Unity, pink boxes usually means you have a bad shader or unassigned material.

Check the material asset and see what shader it's using.
Also check your Spine AtlasAsset to see if you assigned that material to your AtlasAsset.
Make sure you add the Material asset onto the Materials array of the AtlasAsset.

nouk66

Thanks Pharan,
I checked all these points, but everything seem to be allright.
The material asset is added onto the materials array, and the assignements of AtlasAsset are good.
Pink boxes are always there. Maybe there is a conflict between two animations using a same texture/material ? (not very logical anyway)
ex :"name1.png" in an AtlasAsset of one animation and the same "name1.png " in another AtlasAsset of another animation

Pharan

It's perfectly fine to share atlases.
It's also fine to have files of the same name as long as Unity doesn't complain.

Were there any error or warning messages in the console?
What were you talking about when you said you had 2 separated folders?

nouk66

I was talking about differents folders of assets I would like to pack, selecting them in the texture packer.
The goal is to have 2 characters of one single animation and pack them, in this way I could use one folder of assets for differents animations.
The log from Unity say something like this : "Material with texture name "skeleton4" not found for atlas asset: Atlas"
I haven't any texture named like this, and the fourth texture of the list is also clean.

Pharan

Ah, it sounds like you renamed the files after packing.

Spine-Unity has this weird bug/quirk/limitation (I think because it relies on generic Spine-C#?) that despite assigning the material to the atlas asset, it still reads the filename in the .atlas file and tries to look for it and fails if it can't find it.

I'm not too familiar with that part of the runtime code so I can't help you regarding how to fix the quirk.
But for now, you have to make sure that the filename on the first line of the .atlas file ALWAYS matches the .png file.
I guess that means you can do one of two things:

Edit the .atlas file in any text editor so the atlas matches the new .png filename.
or...
Don't rename the .png.

Nate

It's a feature. 🙂 The atlas asset needs one or more (for a multi page atlas) materials. You specify the materials on the atlas asset, but it needs a way to know which asset it which. It does this by looking at the name of the material.