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README: More //erode snowballs documentation

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@ -257,14 +257,14 @@ The sigma value is only applicable to the `gaussian` kernel, and can be thought
//convolve gaussian 5 0.2
```
## `//erode [<snowballs|...> [<key_1> [<value_1>]] [<key_2> [<value_2>]] ...]`
#### `//erode [<snowballs|...> [<key_1> [<value_1>]] [<key_2> [<value_2>]] ...]`
Runs an erosion algorithm over the defined region, optionally passing a number of key - value pairs representing parameters that are passed to the chosen algorithm. This command is **experimental**, as the author is currently on-the-fence about the effects it produces.
Currently implemented algorithms:
Algorithm | Mode | Description
------------|-------|-------------------
`snowballs` | 2D | The default. Simulates snowballs rolling across the terrain, eroding & depositing material. Then runs a 3x3 gaussian kernel over the result (i.e. like the `//conv` / `//smoothadv` command).
`snowballs` | 2D | The default - based on [this blog post](https://jobtalle.com/simulating_hydraulic_erosion.html). Simulates snowballs rolling across the terrain, eroding & depositing material. Then runs a 3x3 gaussian kernel over the result (i.e. like the `//conv` / `//smoothadv` command).
Usage examples:
@ -276,7 +276,8 @@ Usage examples:
Each of the algorithms above have 1 or more parameters that they support. These are detailed below.
### Parameters: snowballs
### Algorithm: `snowballs`
Based on the algorithm detailed in [this blog post](https://jobtalle.com/simulating_hydraulic_erosion.html) ([direct link to the source code](https://github.com/jobtalle/HydraulicErosion/blob/master/js/archipelago/island/terrain/erosionHydraulic.js)), devised by [Job Talle](https://jobtalle.com/).
Parameter | Type | Default Value | Description
--------------------|-----------|-------------------|------------------------