Questions about exposure setting

[Defair]

Dear streamline developers, what will happen if I set exposure value to sl::DLSSOptions::exposureScale While not tag exposure texture or Tag a null to it？Is this allowed and correct？The reason why I do this is my engine calculate exposure in CPU side，not GPU side. Although I can create a texture or buffer, upload exposure value to it. But I want to know, could I skip this step, just set exposureScale instead. Thank you very much.