Version 4.0 is used in the GeForce 6 and GeForce 7 series, and includes two new methods, transparency supersampling (TSAA) and the faster but lower-quality transparency multisampling (TMAA).
For the GeForce 6 and GeForce 7 series, version 4.0 was implemented, introducing two novel methods: transparency supersampling (TSAA) and faster but less detailed transparency multisampling (TMAA).