Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.
CloseFor some reason your suggested change could not be submitted. Please <a>try again</a> in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.
CloseMotion vector mode.
Unity configures the following built-in shader uniforms to calculate motion vectors in HLSL code: unity_MotionVectorsParams
, unity_MatrixPreviousM
and unity_MatrixPreviousMI
.
For Mesh ray tracing instances, unity_MotionVectorsParams
is a vector uniform. Its component values are as follows:
unity_MatrixPreviousM
and unity_MatrixPreviousMI
are the instance matrix and its inverse respectively used in the previous frame. Note that Unity only updates these matrices only when there's a Camera in the Scene that's using the DepthTextureMode.MotionVectors flag in Camera.depthTextureMode.
To access the ray tracing instance matrix in closest hit, any hit, and intersection shaders, use the ObjectToWorld
or WorldToObject
HLSL functions.
Additional resources: MotionVectorGenerationMode.