SkeletonGraphic CanvasGroup Compatible enable not working by assetbundle load

justintien

Unity 2021.3.5f1 (40eb3a945986)
Spine runtime spine-unity unitypackage (spine-unity-4.1-2023-01-11)

I build spine file to assetbundle file.
(Default shader is Spine/Skeleton)

I add spine component in script C#

I have omitted most of the code and only posted the key codes

// assetbundle load releated:
Material materialPropertySource = new Material(Shader.Find("Spine/SkeletonGraphic"));
materialPropertySource.SetInt("_CanvasGroupCompatible", 1);
SpineAtlasAsset runtimeAtlasAsset = SpineAtlasAsset.CreateRuntimeInstance(atlasAsset, textures.ToArray(), materialPropertySource, true);
runtimeSkeletonDataAsset = SkeletonDataAsset.CreateRuntimeInstance(dataAsset, runtimeAtlasAsset, true);

.....

// create spine el
skelG = spine.AddComponent<SkeletonGraphic>();
skelG.allowMultipleCanvasRenderers = false;
skelG.material = new Material(Shader.Find("Spine/SkeletonGraphic"));
skelG.material.SetInt("_CanvasGroupCompatible", 1);

...parent canvas group set alpha to 0.7

Yes, in unity editor preview is fine.

But when built app, it's not good. (Too bright, I think this is due to the fact that it is not enable CanvasGroup Compatible)

And I tested web preview (phaser3)

Even I set material.SetInt("_CanvasGroupCompatible", 1);

I know it's about CanvasGroup Compatible not enable, but I don't know missing what?

I also check Spine/Runtime/spine-unity/Materials/SkeletonGraphicDefault.mat default is disable (I also tested default enable it, still not work)

Harald

The int parameter _CanvasGroupCompatible is just an editor parameter which behind the scenes sets the _CANVAS_GROUP_COMPATIBLE shader keyword (preprocessor define, effectively switching to the respective shader variant). Whenever you see a shader parameter with Toggle in front like the following, you need to set the material keyword (typically in all uppercase letters) instead of the int parameter:
[Toggle(_CANVAS_GROUP_COMPATIBLE)] _CanvasGroupCompatible("CanvasGroup Compatible", Int) = 1

So you would then set it via the following line: material.EnableKeyword("_CANVAS_GROUP_COMPATIBLE");

Aside from fixing the issue: Instead of creating the material from scratch via code, it would likely be easier to create a template material where the common settings are already setup.

justintien

Harald

Thanks.

Both of these methods can solve

material.EnableKeyword("_CANVAS_GROUP_COMPATIBLE");.
Create a material to resource. Resources.Load<Material>("Spine/SkeletonGraphicDefault");

Harald

Glad to hear you've figured it out, thanks for getting back to us.

justintien

Harald

Sorry, new question continues

When CanvasGroup Compatible is enabled, the colours when playing the animation are abnormal.

(The fluid in the mouth should be white)

How can I fix this?

=================

I found that when I disable the PMA Vertex Colors option in SkeletonGraphic,

the colours are normal, but I don't know if there are any other problems.

Harald

Please see the documentation here for details:
http://esotericsoftware.com/spine-unity