SpriteSkin Warnings After Upgrading to Unity 6000.0.48f1

[YeoJoon]

The current version of Unity is 6000.0.48f1. Before upgrading, it was 2022.3.

I’m getting logs from SpriteSkin components that use the “Particles/Standard Unlit” shader, stating:
…is using a shader without GPU deformation support. Switching the renderer over to CPU deformation.

2d sprites throwing GPU deformation support warnings

As mentioned above, we are working on ShaderGraph support for Sprite GPU Skinning and will be posting an update soon. Until then, please Add the suggestion above to make Shaders compatible for Sprite GPU Skinning. Disable GPU Skinning in Player Settings (Player → Other Settings → Rendering → GPU Skinning → CPU). This will fallback to CPU skinning / Dynamic Batching. Here is a simple sample for option 1 (check comments with Sprite GPU Skinning): Shader "Sprites/GPUAnimate" { Properties …

following measure from this reply,
changing the project’s GPU Skinning setting to “CPU” eliminates the warning messages.

However, I don’t understand why the GPU Skinning option—previously set to “true” in Unity 2022.3—didn’t generate any such logs before.

Will changing the GPU Skinning setting to CPU have any impact? I’d like it to work the same way it did in the earlier version.

Also, I noticed new warnings.

“Adding null Transform to TransformAccessArray will result in degraded performance.”
UnityEngine.U2D.Animation.DeformationManagerUpdater:LateUpdate()

Is this possibly the same cause?

[Venkify]

@YeoJoon

However, I don’t understand why the GPU Skinning option—previously set to “true” in Unity 2022.3—didn’t generate any such logs before.

GPU Skinning support for SpriteSkin was only added in Unity 6 and above. In older versions such as 2022.3 CPU Skinning was always in use regardless of the option.