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PerfectWorld3 - Updated

Synopsis

This is an updated version of PerfectWorl3 by Cephalo. It is intended to look play and feel like PerfectWorld. I have implemented numerous bugfixes and optimizations as well as altering how some map elements get placed. I've added an optional terrain matching feature that gets rid of stray tiles (this is turned off by default, read the configuration section for details on changing this).

From the original mod:
This map script uses various manipulations of Perlin noise to create landforms, and generates climate based on a simplified model of geostrophic and monsoon wind patterns. Rivers are generated along accurate drainage paths governed by the elevation map used to create the landforms.

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Recommended Installation

I Highly recommend moving script itself from the \Mods\ directory and placing it in the following folder:
\My Documents\My Games\Sid Meier's Civilization V\Maps

You should uncheck the mod in the mod browser once you've moved the script to the \Maps\ directory; it should already appear in your list of maps. I have not tested multiplayer, but it should work if all players have the script in the folder mentioned above. Placing the script there also allows you to get achievements while playing singleplayer. The biggest thing this accomplishes is to prevent Steam from re-downloading and overwriting the script. With the configurable constants found at the top of the file, Steam overwriting your tweaked version can be a real pain...

Alternative Download
CivFanatics[forums.civfanatics.com]

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Configuration

If you don't like something about the map, there's most likely a tweakable constant at the top of the script that will affect whatever it is you have an issue with. Any text editor will work for viewing the script, though I personally recommend NotePad++. I have re-orgianized the constants and added notation so that it's (hopefully) easier for someone, who is new to the map, to jump in and get there feet wet with configuring the script.

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ChangeLog

v5b:
-Implemented multiple fixes for ghost tiles (tiles that retain invalid heightmap and texture information after being re-plotted, which causes them to appear to be something other than what they are) and map seam issues, including Xshift.
-Improved Oasis Placement.
-Changed Marsh Placement.
-Fixed some issues with feature/terrain striping near the equator.
-Added optional terrain matching features.
-Prevented single-tile mountain islands.
-Implemented a multiplayer-ready random.
-Fixed an issue with threshold determination that sometimes caused an infinite loop.
-Refined threshold determination.
-Changed the main constant YtoXRatio to calculate it's value based on the map's dimensions. Landmasses should appear less stringy and less vertically-skewed.
-Fixed the possibility for rivers that can't path to a body of water!
-Changed how the average height around a river junction was getting determined.
-Removed local copy of elevationMap from riverMap. It wasn't necessary since elevationMap is Global and there were no changes being made to the local copy.
-Fixed and Optimized SiltifyLakes().
-Raised the iteration limit of SiltifyLakes() to 10,000,000 and changed the error status to just log a message instead of crashing the map. It seriously should not be possible to hit anywhere near 10 million iterations without there being an infinite loop, seriously.
-Implemented a vast number of optimizations. It runs in about 1/10th of the time compared to v4.
-Probably 40 other things I can't recall right now.