Soft mask doesn't work with dynamic resolution on Android

[Escuedro]

I use URP. I have two cameras - main camera which is rendering everything but UI layer and UI camera for UI layer. Main camera is Base, UI camera is Overlay and it's in Main camera's stack. When I use Allow Dynamic Resolution on Main camera - it stops working on Android. It works fine in Editor.

To Reproduce
Steps to reproduce the behavior:

1. Download minimal project:
   SoftMaskDynamicResolution.zip

2. Build Android Build

Expected behavior
Working soft mask on Android with Dynamic resolution

Screenshots
How it looks in Editor:

How it looks on Android device:

Environment (please complete the following information):

• Version 3.2.2
• Platform: Android
• Unity version: 2022.3.56f1
• Build options: IL2CPP, .Net Standard 2.1, URP

[mob-sakai]

Thank you for your reporting!

[mob-sakai]

Hmm, it seems that when AllowDynamicResolution=true, SoftMask may disappear depending on the combination of dynamic resolution and render scale.

• RenderScale=1、DynamicResolution=(1.0, 1.0): NG
• RenderScale=0.5、DynamicResolution=(1.0, 1.0): NG
• RenderScale=0.96、DynamicResolution=(0.9, 0.9): NG
• RenderScale=0.95、DynamicResolution=(0.9, 0.9): OK
• RenderScale=1、DynamicResolution=(0.9, 0.9): OK

private void Awake()
{
    const float dynamicResolutionScale = 0.5f;
    const float renderScale = 0.5f;
    
    ScalableBufferManager.ResizeBuffers(dynamicResolutionScale, dynamicResolutionScale);
    var pipelineAsset = GraphicsSettings.currentRenderPipeline;
    if (pipelineAsset)
    {
        pipelineAsset
            .GetType()
            .GetProperty("renderScale")
            .SetValue(pipelineAsset, renderScale);
    }

    camera.allowDynamicResolution = true;
}

[mob-sakai]

Solution based on this result: If dynamicResolutionScale=1, set AllowDynamicResolution=false.
Especially for URP, use only RenderScale and set AllowDynamicResolution=false.

[Escuedro]

Thanks, it worked for me! So now when I want to use dynamic resolution, I only call ScalableBufferManager.ResizeBuffers() and change RenderScale

I guess you should mention this case in Limitations

[mob-sakai]

That makes sense.
I have updated the README. ✅