Awesome

URP-ScreenSpaceCavity

<img src="/../pics/pics/g-preview.gif" width="100%" height="100%"></img>

How to preview

• Install Universal Render Pipeline.
• Download and import the Unity package.
• Open scene from <b>Assets/PolygonStarter/Scenes/Demo.unity</b>.

<b>Tested with</b> Unity version - 2020.3 URP version - 10.7

Configurable parameters

<img src="/../pics/pics/params.jpg" width="100%" height="100%"></img>

• <b>Type</b>:
  • <b>Curvature</b> - highlights only the edges of objects.
  • <b>Cavity</b> - highlights the edges with the Ambient Occlusion effect.
  • <b>Both</b> - well, it's understandable :man_shrugging:.
• <b>Curvature</b>:
  • <b>Scale</b> - effect width.
  • <b>Ridge</b> - effect ntensivity for ridge (white).
  • <b>Valley</b> - effect ntensivity for valley (black).
• <b>Cavity</b>:
  • <b>Distance</b> - distance of effect from edge.
  • <b>Attenuation</b> - fading out the effect relative to the camera (relevant for nearby objects).
  • <b>Ridge</b> - effect ntensivity for ridge (white).
  • <b>Valley</b> - effect ntensivity for valley (black).
  • <b>Samples</b> - number of passes to calculate the effect.

Shader setup

Here is an example of parts of the code for the shader to work with Cavity:

#if defined (_SCREEN_SPACE_CAVITY)
  #include "CavityInput.hlsl"
#endif

#pragma multi_compile_fragment _ _SCREEN_SPACE_CAVITY
#pragma multi_compile _ _CAVITY_DEBUG

#if defined (_SCREEN_SPACE_CAVITY)
  if (_CavityEnabled)
  {
    float2 normalizedUV = GetNormalizedScreenSpaceUV(input.positionCS);
    half cavity = SampleCavity(normalizedUV);
    #ifdef _CAVITY_DEBUG
      albedo.rgb = cavity * 2.0;
    #else
      bakedGI *= cavity * 4.0;
      lightColor *= cavity * 4.0;
    #endif
  }
#endif

<b>The main thing is to get the cavity value and use it to apply the color:</b>

#include "CavityInput.hlsl"
float2 normalizedUV = GetNormalizedScreenSpaceUV(input.positionCS);
half cavity = SampleCavity(normalizedUV);
color *= cavity * 4.0;

Attention! A custom shader must have passes for normals and depths.

Notes

• As an example, use the free POLYGON Starter Pack asset from reputable Synty Studios.
• If you are not familiar with the Universal Render Pipeline, you can find the official tutorial here.
• Writing Shaders.

Good to everyone!:v: