Dantes was the first to try it on Red Baron 3D with the dgVoodoo Glide Wrapper which can run with DirectX9 depending on the settings of the wrapper. This is a great find. Look at these awesome screenshots Dantes has made. They are straight out of the game and contain no postwork.
Dantes has uploaded a zipped package with his custom settings suitable for Red Baron II/3D here. The settings for the effects can be altered.
Note: This will work with the
Dantes also made a video showing the differences with the plug-in and without:
See Dantes' posting on SimHQ here.
The plug-in author's homepage is here.