I have read the Motion Instance Acceleration Structure section of the document carefully. But I still have some confusion.
What does the number of keys of motion IAS affect the traversal performance? What does the number reflect? In the optixSimpleMotionBlur example, there are two instances which reference triangle mesh and sphere mesh, respectively. They both have 3 motion keys, while the number of motion keys of the motion IAS is set to 2 and the values of motion keys are not set. Why is this?
I still do not understand how to define the number of motion keys of IAS. It is described in the document that Finally, the quality of the instance acceleration structure is also affected by the number of motion keys of the referenced traversables of the instances. So how does it affect? For example, a referenced motion transform has 3 motion keys and the other motion transform has 2 motion keys. How do we define the number of motion keys for IAS to get good performance now?
Thanks in advance.