I may be misinterpreting your statements, and if so, my apologies ... but, as one of the original beta testers for Lime Rock, I felt a need to question, or at least clarify, your statements
The Repository horizon is a fair representation of the actual topography at the track site.
your statement implies that the existing topography is not accurate
have you ever been to the actual track site ? ... many of the beta testers have, including Alison Hine and Nafi Coker, Nafi regularly raced his BMW at the track and provided in car video
Steve Smith, author of the Grand Prix Legends book, "4 wheel drift" wrote, "Brent Adams' original Lime Rock remains one of the most authentic tracks in GPL" ... he also wrote "Whereas Brent's 1.53-mile (and, with chicane, 1.54-mile) Lime Rock has been done in the modern idiom, the 2.93-mile Mountain Circuit is presented as it might have looked in 1957, when the track first opened to the public on the weekend of April 27-28. Brent used (track designer) Loewy's renderings, contemporary aerial photography, an elevation of the proposed addition, topo maps, and modern 3D satellite views to make the layout as authentic as possible."
so, it is my contention that the "actual topography at the track site" is as realistic as possible, at least it was back in 2001/2, and far more accurate than a Repository horizon ... if Brent were around, I think he might question this statement as well ... I helped test the original LRP for well over a year before it was publicily released, and I know all the incredibly hard work Brent did to make both these tracks as accurate as possible
if your implication was not as I interpreted it, then my apologies ... your Repository horizon certainly could be an alternative ... but to imply that it is more accurate is incorrect, imho
"The Mountain course now purrs like a kitten after the sub-image correction"
... I think you are saying that you changed the sub-images to make for smoother graphics rendering for your system, not that Brent made any mistake that needed correcting ... of course, using the available tools, procedures and images from back in 2001 may make the track seem dated now, compared to more recently available tools, procedures and images
I realize you are replacing mips, etc in the interest of smoother running tracks due to your computer limitations ... and I congratulate you for that, smoother running tracks for all is a great contribution
I hope you take this not as a criticism of what you do, but simply a clarification of grammatical nomenclature
your "update" is a nice fictional alternative to an already topographically accurate, but also semi-fictional, track ... thank you for your work and best regards
2001 LRP beta tester