UnityToonShader causes black flickerings (NaN) when using HDRP

[Haoming02]

Describe the Bug

UnityToonShader causes NaN when using HDRP

To Reproduce

1. Open a HDRP Project
2. Apply ToonShader
3. Look around / Use Recorder to record a footage
4. See black flickerings caused by NaN

Expected Behavior

... No NaN?

Videos

NaN.mp4

Multiple.mp4

FullScreen.mp4

Environment

• OS: Windows 10
• GPU: RTX 3070 Ti
• Unity Version: 2022.3.4f1
• HDRP Version: 14.0.8
• UnityToonShader Version: 0.9.4-preview

Additional Context

• Forward Lit Shader Mode
• SSAO Disabled
• Tried both FXAA and SMAA
• Enabling Stop NaNs causes the flickerings to be limited to the material; Disabling it causes the whole screen to flash
• Highlight, Rim Light, MatCap and Outline are all disabled

[Haoming02]

• Linear Color Space
• Graphics API: Direct3D11
  • It's even worse when using Direct3D12...

[H3idi-X]

We are sorry to hear that UTS doesn’t work well with Recorder and Timeline.
We tried to reproduce the issue but so far not succeeded.
Could you upload the project which you see the issue?

[Haoming02]

Update: When using Direct3D12, the flickerings can even happen in Scene view without using Recorder or Timeline.

Example

• In the beginning, you can see the flickering in the Camera Preview
• At ~3 second, I enabled Stop NaNs. You can see the flickering is now limited to just a part of the capsule
• At ~10 second, the whole Scene view is flashing when I move around
• However, these do not happen after I swap the material to HDRP/Unlit at ~20 second
• Then they start happening again right after I swap back to Toon at ~32 second

Demo.mp4

Environment

This is on another computer and still happens...

• OS: Windows 11
• GPU: RTX 3060
• Unity: 2022.3.2f1

[Haoming02]

Project Settings & Packages

The above video was shot in a freshly created project

project.zip

[Haoming02]

Seems to not happen (or at least significantly less) when using Vulkan Graphics API

[H3idi-X]

Hi, we reproduced the issue in your project. We are on investigation now.

[H3idi-X]

Hello. We have investigated this issue and unfortunately have not yet been able to resolve it. We apologize for this, but could you please deal with this issue with other APIs, such as Vulkan?