<h2>NewGRF New Landscape Addition to NewGRF Specifications in JGR's Patchpack in NML</h2>
<p>This document describes the non-standard addition of the NewGRF new landscape feature to the <ahref="https://newgrf-specs.tt-wiki.net/wiki/NML:Main">Official OpenTTD NML Specifications</a>, as implemented in this patchpack, and the associated <ahref="https://github.com/JGRennison/nml">NML fork</a></p>
<p>This feature allows NewGRF custom graphics using switches and spritesets for landscape tiles. Currently this includes: rock tiles.</p>
<p>This feature may not necessarily match implementations of additional landscape graphics features in other patches, branches, etc.<br/>
This feature as implemented here MAY also be present in other patchpacks.</p>
<p>The feature identifier is <spanclass="code">FEAT_NEWLANDSCAPE</span>.<br/>
There is no permanent storage associated with this feature.</p>
<p>See the <ahref="newgrf-additions-nml.html">NewGRF additions (NML)</a> document for background information on additions to NML.</p>
<p>See the associated <ahref="newgrf-newlandscape.html">non-NML document</a> for more details on the NewGRF new landscape feature.</p>
<p>This feature will be automatically skipped when loaded into a version of OpenTTD which does not support this feature.<br/>
If this feature is the only significant thing in this GRF, then <spanclass="code">extended_feature_test("new_landscape")</span> SHOULD be called and some message, error or other form of
signalling to the user used to inform the user that this version of OpenTTD does not support the feature, if the return value is false.<br/>
Otherwise the GRF could silently do nothing instead of the expected functionality, creating confusion for end users.</p>
<tr><td>terrain_type</td><td>TILETYPE_XXX</td><td>XXX = NORMAL | DESERT | RAIN_FOREST | SNOW</td></tr>
<tr><td>tile_slope</td><td>SLOPE_XXX</td><td>See <ahref="https://newgrf-specs.tt-wiki.net/wiki/NML:List_of_tile_slopes">tile slopes</a> for an overview of possible values</td></tr>
<tr><td>tile_height</td><td>0..255</td><td>Height of the lowest corner of the tile</td></tr>
<tr><td>tile_hash</td><td>0..4294967295</td><td>Hash value derived from the coordinates of the tile, suitable for pseudo-randomising graphics</td></tr>
<tr><td>snow_present</td><td>0 or 1</td><td>Snow is present on this tile, at any density.</br>This requires <fontface="monospace">new_landscape</font>, version 2.</td></tr>
<tr><td>ground_density</td><td>0..3</td><td>Ground density (if snow_present is 1, this is the snow density).</br>This requires <fontface="monospace">new_landscape</font>, version 2.</td></tr>
<tr><td>nearby_tile_slope</td><td>x, y offset (-8..7)</td><td>SLOPE_XXX</td><td>Slope of a nearby tile</td></tr>
<tr><td>nearby_tile_is_same_type</td><td>x, y offset (-8..7)</td><td>0 | 1</td><td>Is nearby tile the same landscape type as this one?</td></tr>
<tr><td>nearby_tile_is_water</td><td>x, y offset (-8..7)</td><td>0 | 1</td><td>Is nearby tile a water tile?</td></tr>
<tr><td>nearby_tile_terrain_type</td><td>x, y offset (-8..7)</td><td></td><td>See terrain_type</td></tr>
<tr><td>nearby_tile_water_class</td><td>x, y offset (-8..7)</td><td>WATER_CLASS_XXX</td><td>XXX = [NONE | SEA | CANAL | RIVER]<br/>Note that tiles for which nearby_tile_is_water is 0 may still have a water class, e.g. industry tiles with water beneath them. </td></tr>
<tr><td>nearby_tile_height</td><td>x, y offset (-8..7)</td><td></td><td>The minimum height of the given tile in height level units</td></tr>
<tr><td>nearby_tile_class</td><td>x, y offset (-8..7)</td><td><ahref="https://newgrf-specs.tt-wiki.net/wiki/NML:List_of_tile_classes">tile class</a></td><td></td></tr>
<tr><td>nearby_tile_info</td><td>x, y offset (-8..7)</td><td></td><td>Above nearby tile variables in one variable (all of variable 0x60)</td></tr>
