Kurt,
Thanks very much for the detailed explanation.
I understand & agree with your design choices.
I think it would be useful to add this to your download - that way its clear to the user, & should avoid some of the (inevitable?) " I installed & this doesn't work..." posts at some point in the future...
For clarity, my own rationale was:
I tried 4 mth timeline points, but discarded as I thought most users would get fed up changing gsl too frequently. So, having decided on 6 monthly timelines, I just extrapolated forwards from the end of 87 Days (NOV '42).
So, '43 Early is circa March/April, & '43 Late is circa September/October.
I agree the Renard fields really don't fit this pattern, but seeing as they were the first step up the Solomons chain, I thought leaving them until Late '43 was just too late.
I recall Maskrider also having issues with airbase backgrounds partly disappearing in Mission Builder. It seems to be how Mission Builder uses mesh.
Kevin Driver indicated it might be Mission Builder defaulting to a lower level of scenery detail.
I have Rhumbas mesh (& most add-on scenery) installed in a folder structure that sits outside of CFS2. I now believe that Mission Builder only seems to read mesh from within the CFS2 folder structure. In "most" cases, placing a copy of the offending airbase A16N flattens in the CFS2/SCENEDB/RUNWAYS/SCENERY folder allows the base to display correctly in Mission Builder, allowing you to place objects etc.
I don't recommend leaving the A16N there afterwards. The A16N flatten mesh blending logic is rather coarse, & forcing the sim to load this flatten last can ruin how the surrounding terrain looks in the Sim proper.
I haven't looked at the scenery in an OOB install, but suspect the CFS2 LOD5 mesh has pinpoint artifacts (I found a similar issue on Tarawa) that create these display anomalies.