File Description: This is a standalone program that allows you to change the terrain textures of outer terrain megatiles by applying altitude based rule changes. This means that the Editor allows you to do what FU3 does through the RULES.TXT file but in visual form and on a per tile basis. The Editor converts and displays l0xxxx.gtl files and their corresponding l5xxxx.geo elevation files to 512x512 bitmaps. It also displays useful information when moving the mouse across the main display, i.e. Min Alt, Max Alt, Alt Range, Alt Index, Texture and so on. The Index value is an altitude range corresponding to the 64 colours used to create the elevation bitmap and is useful when specifying Min Alt and Max Alt values for rule changes. You can apply up to 8 rule changes at a time (just repeat until you get the desired results), either to the entire tile or to a subsection defined as X and Y co-ordinates. The Editor displays X-origin and Y-origin values within the tile as an aid to this. You can use this with the default 13 textures or with my extended 26 textures.