DIY terrains with gaps in "ground" texture generate glitch maps

(Up to Tricks and glitches (first generation))

An example of a glitched map, with arbitrary curved lines and boxes cut out of the terrain

If a gap of any size is left in the "Ground" texture in an IFF template converted to a DIY terrain, errors will occur during the random map generation process that result in distorted and corrupted terrain. The size, consistently and pattern of the gaps will have various effects on the terrain that range from minor holes and "stalks" to the sort-of vertical interlacing as seen in the screenshot to the right.

So far in testing, this glitch has not resulted in any crashes or lock-ups, and these maps may be played on without any problems other than their strange appearance.