What Unity feature allows developers to create custom shaders for materials?

Shader Graph is a powerful feature in Unity that enables developers to create custom shaders through a visual, node-based interface. This approach eliminates the need to write code manually, making shader creation more accessible to artists and designers who may not have programming experience. By using Shader Graph, developers can create complex visual effects by connecting various nodes that represent different shader functions, allowing for greater creativity and flexibility in material design.

In contrast, the Material Editor is more of a standard interface for adjusting and configuring existing materials rather than creating custom shaders. The Sprite Renderer is specifically for displaying 2D sprites and does not deal with shader creation directly. The Post Processing Stack is focused on applying visual effects post-rendering, such as bloom or color grading, rather than on the creation of shaders themselves. Thus, Shader Graph stands out as the dedicated tool for developing custom shaders in Unity.