The Built-in Render Pipeline is Unity’s default render pipeline. It is a general-purpose render pipeline that has limited options for customization. The Universal Render Pipeline (URP) is a Scriptable Render Pipeline that is quick and easy to customize, and lets you create optimized graphics across a wide range of platforms. The High Definition Render Pipeline (HDRP) is a Scriptable Render Pipeline that lets you create cutting-edge, high-fidelity graphics on high-end platforms.
Unity Free Source Code
Although this Unity Asset is typically a paid asset, it is currently available for free download. It’s important to note that this offer is intended strictly for educational purposes or for testing the product before making a purchase, and it should not be utilized for commercial activities
UNITY ASSET STORE LİNK: LINK
Features:
~Simple but strong editing tools to let you create grass the way you want and paint color and grass parameters for perfect artistic control right from the editor just like the Unity terrain tools. Even supports undo/redo!
~Supports grass texture atlas and you can paint density of individual textures to lay out your grass as you please.
~Can be attached to meshes or Unity terrain with terrain layer/splat map support.
~Grass properties can be easily changed at runtime to allow for interactivity, ex: players can flatten grass by any means. Also includes a system of creating ripple effects for gently (or no so gently) pushing the grass around.
DOWNLOAD LINK: LINK