--- layout: stdlib-reference --- # TraceMotionRay ## Description Traces a ray with motion blur support through the acceleration structure. ## Signature

void TraceMotionRay<payload_t>(
    RaytracingAccelerationStructure AccelerationStructure,
    uint RayFlags,
    uint InstanceInclusionMask,
    uint RayContributionToHitGroupIndex,
    uint MultiplierForGeometryContributionToHitGroupIndex,
    uint MissShaderIndex,
    RayDesc Ray,
    float CurrentTime,
    inout payload_t Payload);

## Generic Parameters #### payload\_t ## Parameters #### AccelerationStructure : [RaytracingAccelerationStructure](../types/raytracingaccelerationstructure-0am/index.html) The acceleration structure to traverse #### RayFlags : uint Flags controlling ray behavior #### InstanceInclusionMask : uint Mask for filtering instance visibility #### RayContributionToHitGroupIndex : uint Offset for hit group indexing #### MultiplierForGeometryContributionToHitGroupIndex : uint Multiplier for geometry-based hit group indexing #### MissShaderIndex : uint Index of the miss shader to execute if no hit is found #### Ray : [RayDesc](../types/raydesc-03/index.html) Description of the ray to trace #### CurrentTime : float Time value for motion blur interpolation #### Payload : [payload\_t](tracemotionray-05b.html#typeparam-payload_t) Structure for passing data between shaders ## Remarks Extended version of TraceRay with motion blur support ## Availability and Requirements Defined for the following targets: #### glsl Available in stages: `raygen`, `closesthit`, `miss`. #### spirv Available in stages: `raygen`, `closesthit`, `miss`. Requires capabilities: `spvRayTracingMotionBlurNV`, `spvRayTracingKHR`.