The Unity-Technologies/PostProcessing repository is a collection of post-processing effects for Unity, designed to enhance the visual quality of games and applications. It provides a suite of image effects that can be applied to the final rendered image, including color grading, bloom, depth of field, and more.

Pros

• Offers a wide range of high-quality post-processing effects
• Optimized for performance, suitable for both mobile and high-end platforms
• Easily customizable through a user-friendly interface in Unity
• Regularly updated and maintained by Unity Technologies

Cons

• Can be resource-intensive if overused, potentially impacting performance
• Learning curve for beginners to understand and effectively use all features
• Some effects may not be compatible with certain rendering pipelines
• Occasional bugs or compatibility issues with specific Unity versions

Code Examples

1. Adding the Post-Processing Volume component:

using UnityEngine;
using UnityEngine.Rendering.PostProcessing;

public class AddPostProcessingVolume : MonoBehaviour
{
    void Start()
    {
        PostProcessVolume volume = gameObject.AddComponent<PostProcessVolume>();
        volume.isGlobal = true;
        volume.profile = ScriptableObject.CreateInstance<PostProcessProfile>();
    }
}

2. Configuring a Bloom effect:

using UnityEngine;
using UnityEngine.Rendering.PostProcessing;

public class ConfigureBloom : MonoBehaviour
{
    void Start()
    {
        PostProcessVolume volume = GetComponent<PostProcessVolume>();
        if (volume != null && volume.profile != null)
        {
            Bloom bloom;
            if (volume.profile.TryGetSettings(out bloom))
            {
                bloom.intensity.value = 1.5f;
                bloom.threshold.value = 1.0f;
            }
        }
    }
}

3. Dynamically adjusting Depth of Field:

using UnityEngine;
using UnityEngine.Rendering.PostProcessing;

public class AdjustDepthOfField : MonoBehaviour
{
    public PostProcessVolume volume;
    public Transform target;

    void Update()
    {
        if (volume != null && volume.profile != null && target != null)
        {
            DepthOfField dof;
            if (volume.profile.TryGetSettings(out dof))
            {
                float distance = Vector3.Distance(transform.position, target.position);
                dof.focusDistance.value = distance;
            }
        }
    }
}

Getting Started

1. Install the Post Processing package via Unity's Package Manager.
2. Create a new Post-processing Layer on your camera:
   • Select your camera in the Hierarchy
   • Add the Post-process Layer component
   • Set the Layer to "PostProcessing" (create this layer if it doesn't exist)
3. Create a Post-processing Volume:
   • Create an empty GameObject
   • Add the Post-process Volume component
   • Check "Is Global" if you want it to affect the entire scene
   • Create and assign a new Post-process Profile
4. Add and configure effects in the Post-process Profile.
5. Ensure your camera is set to use the PostProcessing layer in its Culling Mask.