Editing Culture Development (section)

== Culture Spread and Conversion ==
The [[File:CulturespreadZero10x.png|frameless|28x28px]]<span style="color: #60c1c8;">spread</span> and [[File:CultureconvertZero10x.png|frameless|28x28px]]<span style="color: #ff9177;">conversion</span> of cultures is a complicated process depending on many factors. The detailed mechanics are described below.

===Detailed Mechanics===
The spread of cultures occur at a fixed rate. The default cooldown for a culture's spread is 1 month, which can be decreased by <span style="color: #60c1c8;">Culture Spread Speed</span> techs. Each <span style="color: #60c1c8;">Culture Spread Speed</span> tech decreases the cooldown by 0.1 month, leading to a cooldown of 0.7 months when all three techs have been unlocked.

Each time a culture attempts to <span style="color: #60c1c8;">spread</span>, it randomly chooses a 8×8 zone in its range (for convenience, we will refer to this as the "origin area"), and find a neighboring chunk to spread to (we will refer to this as the "target area"). This target area must be within the boundaries of a village of the same race.  

*If the target area does not already have a culture, the origin culture will <span style="color: #60c1c8;">'''spread'''</span> to it
*If the target area already has another culture, the spreading culture will try to <span style="color: #ff9177;">'''convert'''</span> it.

===Culture Conversion===
We will refer to the <span style="color: #60c1c8;">spreading</span> culture as the "origin culture (OC)", and the culture to be <span style="color: #ff9177;">converted</span> as "target culture (TC)". 

First, the game calculates a <span style="color: #ff9177;">basic culture conversion success rate</span>. This basic success rate depends on:

*Among the chunks neighboring the origin area, the '''number of chunks (Y)''' which belong to the origin culture equal Y
*Within the target are, the '''number of villagers (Z)''' which belong to origin culture equal Z
*'''Culture convert factor (F)''', by default is 0.1, but can be increased by <span style="color: #ff9177;">Culture Conversion</span> techs. Each <span style="color: #ff9177;">Culture Conversion</span> tech increases this factor by 0.05

The <span style="color: #ff9177;">basic culture conversion success rate</span> (R) is calculated as: '''R = (Y × F) + (Z × 0.05)'''

Then, the actual success rate of this <span style="color: #ff9177;">conversion</span> attempt is calculated based on the population of the two cultures OC and TC:

*If the population of OC > TC, then the actual success rate is the <span style="color: #ff9177;">basic culture conversion success rate</span>
*If the population of OC < TC, then the actual success rate is given by R<small>actual</small> = R × (OC population +1) / (TC population +1)