I have been making higher resolution inserts (1 meter per pixel inside of larger area of 2 mpp inside of larger area of 4 mpp) using GeoConvert and realized that I really needed to find out where the edges of tiles for a given level (9,10,11,12,13,14) are so I don't have any mask TTCs that screw up the overall appearance at the edge of a insert. I also was interested in how the levels were managed by FS2. When I saw that we could generate, via options to the TMC file for GeoConvert, the actual raw images in PNG format, I decided to do that for a test area in Washington state and then replace the PNGs for a given level with a 2048x2048 tile of a given color for that level and then add a black border so I could see the edge of a tile. Then I just used the Content Converter to remake the TTCs for scenery\images. So here is a sequence from starting at 20K feet descending towards a small airport that I made called Harvey north of Seattle. You can see the next level popping in where a previous level was (as many as 4 tiles pop in where there was one). My choice of colors was as follows (Red =9, Orange = 10, Yellow = 11, Green = 12, Blue = 13, and Indigo = 14).The area that I modified was about 100 kilometers from east to west. I have included the Grid Test TTC files (very small since they compress easily) so you can try it - place in scenery\images\GridTest NOTE: I can't seem to get the photos in the right sequence (_s1 is first, s2,...s5) Also, I only did level 12,13,14 for the single Yellow tile (level 11) that had my airport in it.