blurの詳細はN番煎じなので省略して結果だけ
<img src="https://storage.googleapis.com/zenn-user-upload/3846264790be-20231108.png" alt="全体" loading="lazy" class="md-img"> 
<img src="https://storage.googleapis.com/zenn-user-upload/8c864dde1765-20231108.png" alt="サブグラフ" loading="lazy" class="md-img"> 
<img src="https://storage.googleapis.com/zenn-user-upload/988628e6bf1a-20231108.gif" alt="結果" loading="lazy" class="md-img">

URP14~ FullscreenShader shadergraph blur

Discussion