This video provides an introductory walkthrough of the Render Graph API in Unity’s Universal Render Pipeline (URP) using the Render Graph samples. Render Graph, introduced in Unity 6, is a programming interface designed to manage GPU resources and rendering passes efficiently, replacing the older scriptable render passes.

Sample Walkthroughs:
💠Blit: This is the most basic pass. It allocates a temporary texture, copies data from a source to a target, and demonstrates how Render Graph can automatically merge passes.
💠Blit with Material: This approach uses AddBlitPass to apply a shader during the copy process. It is categorized as an "unsafe pass" because Render Graph’s automatic optimization cannot fully manage the resource handling.
💠Frame Buffer Fetch: This technique samples data directly from the GPU buffer without copying it to main memory, which is faster and more memory-efficient.

🔗 Continue learning about the Render Graph system:

Discussions: 
➡️ The Render Graph viewer: https://on.unity.com/RGViewer
➡️ Understanding the Render Graph Samples: https://on.unity.com/RGSamples

Stages of rendering a frame in URP infographic:  https://on.unity.com/URPInfographic
Render graph samples - part 1 (link soon)
Render graph samples - part 2 (link soon)

YouTube Tutorials:
➡️ Introduction to Render Graph in Unity 6: https://on.unity.com/IntroRenderGraph
➡️ Understanding URP and essentials - https://on.unity.com/URPEssentials

E-books:
➡️ Introduction to URP for advanced Unity creators (Unity 6 ed.): https://on.unity.com/AdvancedURP_Ebook
➡️ Create popular shaders and visual effects with the Universal Render Pipeline (Unity 6 ed.): https://on.unity.com/Ebook_shadersURP

Time Stamps: 
00:02 - Intro to the Render Graph API in Unity 6
01:06 - Why Render Graph
01:53 - How custom rendering is handled in URP via renderer features
02:00 - Creating a new boilerplate Render Feature script
02:55 - Sample: Blit
06:34 - Sample: Blit with Material
07:25 - Understanding "Unsafe Passes"
08:56 - Sample: Frame Buffer Fetch
09:40 - Frame Buffer Fetch
10:41 - Shader requirements and LoadFramebufferInput
11:47 - Conclusion

The Unity Blog offers insights, tutorials, and updates on Unity, a popular game engine used for building interactive experiences across various platforms. Covering topics such as game development, virtual reality, and augmented reality, the blog provides resources for game developers and creators. Developers can learn how to use Unity's features, tools, and APIs to build immersive games, simulations, and interactive experiences.

Unity

A walkthrough of Unity's URP Render Graph API samples, covering why Render Graph was introduced to replace scriptable render passes, and how to work with three core samples: basic blit (transient texture allocation, read/write passes), blit with material (applying a shader during copy using add blit pass), and frame buffer fetch (sampling GPU buffers directly without copying to main memory for better performance). The video explains how to install samples via Package Manager, use the Render Graph viewer for debugging, understand pass merging, texture handles, and the difference between safe and unsafe passes.

Migrating to Render Graph: Understanding the Render Graph Samples - Part 1