Thanks for your answer.
This Optix forum has been very helpful, but I would appreciate more if the documentation is written more clearly. To be specific, on p.415 of the 3.0 API reference, it would be great if you can list out all the supported formats instead of just saying
also C++ template and C-style additional declarations for other texture types (char1, uchar1, char2, uchar2
Also, the Optix C++ part in the programming guide isn’t very helpful too. Maybe I am stupid, I’ve spent some time on guessing the function names too, which shouldn’t be the case for clearly written documentations…