ShaderLab command: Conservative

Enables or disables conservative rasterizationThe process of generating an image by calculating pixels for each polygon or triangle in the geometry. This is an alternative to ray tracing.
See in Glossary.

Rasterization is a rendering technique that converts vector data (triangle projections) to pixelThe smallest unit in a computer image. Pixel size depends on your screen resolution. Pixel lighting is calculated at every screen pixel. More info
See in Glossary data (render target) by determining which pixels are covered by triangles. Normally, a GPU determines whether or not to rasterize a pixel by sampling points within the pixel to determine whether they are covered by the triangle; if the coverage is sufficient, then the GPU determines that the pixel is covered. Conservative rasterization means that the GPU rasterizes a pixel that is partially covered by a triangle, regardless of coverage. This is useful when certainty is required, such as when performing occlusion cullingA that disables rendering of objects when they are not currently seen by the camera because they are obscured (occluded) by other objects. More info
See in Glossary, collision detectionAn automatic process performed by Unity which determines whether a moving GameObject with a Rigidbody and collider component has come into contact with any other colliders. More info
See in Glossary on the GPU, or visibility detection.

Conservative rasterization means that the GPU generates more fragments on triangle edges; this leads to more fragment shaderA program that runs on the GPU. More info
See in Glossary invocations, which can lead to increased GPU frame times.

Render pipeline compatibility

Usage

This command makes a change to the render state. Use it in a Pass block to set the render state for that Pass, or use it in a SubShader block to set the render state for all Passes in that SubShader.

Check for hardware support using the SystemInfo.supportsConservativeRaster API. On hardware that does not support this command, it is ignored.

Valid parameter values

Examples

Shader "Examples/CommandExample"
{
    SubShader
    {
         // The rest of the code that defines the SubShader goes here.

        Pass
        {    
              // Enable conservative rasterization for this Pass.
              Conservative True
            
              // The rest of the code that defines the Pass goes here.
        }
    }
}

This example code demonstrates the syntax for using this command in a SubShader block.

Shader "Examples/CommandExample"
{
    SubShader
    {
             // Enable conservative rasterization for this SubShader.
             Conservative True

         // The rest of the code that defines the SubShader goes here.        

        Pass
        {    
              // The rest of the code that defines the Pass goes here.
        }
    }
}