bmjoy / taa_unity_urp

Temporal Anti-Aliasing(TAA) for Unity’s Universal Render Pipeline

Temporal Anti-Alasing for Unity’s Universal Render Pipeline

This Temporal Anti-Aliasing package provides Temporal Anti-Aliasing for Unity's Universal Render Pipeline. It jitters the camera's projection before the whole rendering process, which can samples different surfaces between adjacent frames. Temporal Anti-Aliasing pass can then be enabled to smooth to achieve better band-limiting image after the transparent rendering with the provided Temporal Anti-Aliasing Volume Component for Scriptable Render Pipeline's Volume system, supported by default in Universal Render Pipeline.

Instructions

• Open your project manifest file (MyProject/Packages/manifest.json).
• Add "com.xienaiwen.taa": "https://github.com/sienaiwun/TAA_Unity_URP.git", to the dependencies list.
• Open or focus on Unity Editor to resolve packages.
• Enable "Depth Texture" in the pipeline asset.
• Add TAAFeature in the render's asset setting.
• Add "Temporal Anti-Aliasing" Component in the Post-process Vilome and set the "feedback" param to more than 0.

Requirements

• Unity 2019.3.0f3 or higher.

Motivations

Unity's default Temporal Anti-Aliasing(TAA) has some problems in Universal Render Pipeline (URP). Natively, URP does not support TAA while Unity PostProcess V2 does support. However, PostProcess V2's support fails for TAA because it cannot jitter the camera in the ScriptableRenderPipeline [PostProcessLayer.cs] line:996(https://github.com/Unity-Technologies/PostProcessing/blob/v2/PostProcessing/Runtime/PostProcessLayer.cs) In the Frame Analysis, we also find there is no jitter in the native PostProcess V2 TAA pass.

Result (4x scale ZoomIn)

TAA:

FXAA:

MSAA2x:

MSAA4x: