Unlike the IOM,I've never had stuter free performance with this version of Dundrod using my older computer and video card. This great GPL track now delivers 36 fps all the way around and I believe it has lost little of it's extraordinary beauty by having some of it's mip textures increased in the amount of the sub-images they now possess. Someone is going to have to be mighty persuasive to get me to believe this track isn't still in the top 2 of all the GPL tracks ever created when it comes graphical excellence. With the exception of the horizon,all of this with 4 bit mips. Incredible.
For the standard verion of Dundrod65 use the zip named Dundrod65 fps boost.
If using the standard version of Dundrod and Jim Pearson's Dundrod_green files,you need only apply the second zip named Dundrod65 green fps boost. Just by guessing I found 7 mips that weren't JP original textures mips and those spectator mips I have replaced,use with any combination.
I have not tested the first zip with the 1950 version of the race course.