The DepthPrepass field is a member of the SceneLayerType enumeration in the Sandbox API. It represents a rendering pass that is used to perform a depth prepass, which helps in reducing overdraw during the rendering process. This is particularly useful in complex scenes where multiple layers of geometry might overlap, as it allows the rendering engine to determine which surfaces are visible before performing more expensive shading calculations.
Use the DepthPrepass field when you need to optimize rendering performance by minimizing overdraw. This is typically done by rendering the depth of opaque objects first, allowing subsequent passes to skip rendering pixels that are not visible.
// Example of using SceneLayerType.DepthPrepass
SceneLayerType layerType = SceneLayerType.DepthPrepass;
if (layerType == SceneLayerType.DepthPrepass)
{
// Perform operations specific to the depth prepass
// This could involve setting up rendering states or shaders
}