Occlusion Vision

Solution Overview

  • This solution implements an occlusion-aware rendering system built on the URP framework, capable of displaying silhouettes of objects behind occluders.

  • The effects are customizable. It comes with several built-in occlusion effects and supports user-defined custom effects.

  • It's simple to use; just place the system's prefab into your scene, and it's ready to go.

  • It has a low performance overhead, supports batching, and uses lightweight shaders, making it suitable for mobile platforms.

Feature Support

  • Supports configuring the LayerMask and Color for objects with occlusion effects.

  • Supports grouping, allowing different groups to have unique configurations and styles.

  • Includes several built-in standard occlusion effects.

  • Allows for custom occlusion effects using user-defined shaders.

Built-in Effects

  • SolidColor

  • DitherPattern

  • Fresnel

  • Outline

How to Use

  • Copy the OcclusionVision Prefab from the package.

  • Configure the prefab's parameters and add it to your scene.

  • You can create different copies to meet the needs of various scenarios.

Parameter Description

  • LayerMask: Specifies which objects should have the occlusion effect applied.

  • Color (RGBA): The color of the occlusion effect (supports transparency).

  • Intensity: The intensity of the occlusion effect's color.

  • Shader: The shader that implements the occlusion effect. Built-in effects will set this automatically, while custom effects require manual assignment.

Custom Effects

  • Refer to CustomExample.shader for guidance on writing your own shader.

  • Configure the Occlusion Vision Group parameters:

    • Style: Select Custom.

    • Shader: Assign your custom shader.

Performance Details

  • Batch count will increase, but it supports SRP batching.

  • Batching Overhead: SolidColor = Fresnel = DitherPattern < Outline (Low)

  • Shader Overhead: SolidColor (Very Low) < Outline (Low) < Fresnel (Low) < DitherPattern (Medium)

  • Recommended for use on a reasonable number of objects, not hundreds or more.

Performance Scaling

  • Very Low: Disable the effect if there are more than 10 occluded objects.

  • Low: Disable the effect if there are more than 50 occluded objects.

  • Medium: Disable the effect if there are more than 100 occluded objects.

  • High: Disable the effect if there are more than 200 occluded objects.

  • Flagship: Disable the effect if there are more than 300 occluded objects.

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