IIUC no, they don't add layers, they replace them. For instance, the Windows APIs are implemented in Windows in DLLs that Wine reimplements. Caveat for dxvk, a

IIUC no, they don't add layers, they replace them. For instance, the Windows APIs are implemented in Windows in DLLs that Wine reimplements. Caveat for dxvk, as mentioned by iforgotpassword, there's indeed a translation layer there. Not an expert on the topic.