Advanced Setting:

The setting window can be open by click setting button or through the top menu bar. The texture setting and style setting are folded, click [+] to expand them.

Use the template of Google/Bing/Mapbox, the elevation an texture setting will set to a common value of the selected data source. Use the template value if you are not sure which value is able to use.
Click set to default to clear all your settings, this will not delete your API keys.

Stop and Retry:

After start loading, you can stop the loading process immediately by clicking the Stop button.
The loading state of each piece is showing down the start button.
If You Get some errors in loading, such as network problem, API key out of limitation, fix the problem and click Retry to reload the error pieces.

Combine and Save:

The mesh of terrain generated after the data loading.
They are formed as raw data in the scene, separated in pieces if the pieces of generate setting is more than one.
You can see the differences of raw data and combined mesh in the example scene 534-GalicicaNational.

Combine and Save:

The mesh of terrain generated after the data loading.
They are formed as raw data in the scene, separated in pieces if the pieces of generate setting is more than one.
You can see the differences of raw data and combined mesh in the example scene 534-GalicicaNational.

Drag the character Gameobject to the CharPos field, and select the layer which the pieces of terrain in. The script detects which edge the character is approaching to by check which piece of ground it is on. The Layer of Ground field is the layer mask to avoid other objects which are not supposed to be check. If you set a default layer when generate terrain, the layer mask should be same as the default layer you set.

It takes more space to store the raw data, save them as prefab or unity terrain to keep the size of the scene file.

After the data loading , click combine to combine the pieces into a new Gameobject. The texture will be combined to a full picture file. The combined file retains the vertices texture and normal data.
※The combine and save as terrain operations run with the default setting, use the combine and save window to see more options.
The combine operation process for a bit of time ,it depends on the number of elevation data and the size of texture file.
After the combine operation, the combined mesh can be saved as a prefab.
 If you have not created the terrain completely in one time, you may receive some warning when you combine the meshes. You can go on combine them if you are satisfied with the result data.
※if the total number of vertices is greater than 65535, the mesh CANNOT be combined. It can be saved as terrain only.

Click save as terrain to save the raw data to a unity terrain file. The terrain file retains the texture and more smooth than the mesh terrain. The process of texture combine also takes time, please wait patiently.
See the differences between unity terrain and combined mesh in the example scene Olympic National Park.

All the saved files in the Resources/system data directory.

Combine and Save Window:

if you open an existing scene and want to combine the pre loaded raw data, open the Combine and Save window through top menu bar.

	Drag or select the combined Gameobject to the source object field and click save.
	it will save as a prefab, including the mesh and texture. You can use [x] button to clear the field.

Drag or select the raw data Gameobject to the source object field (must be the parent object), check the texture box and the texture will be combined. If the texture box is unchecked, it will only combine the mesh.

while saving terrain ,you can also check or uncheck the texture box. The base map and height map stand the baseMapResolution and heightMapResolution of the terrain data.

check the customize texture size box, two options of width and height will show up. If they are set to zero, the texture file will use the maximum size of the downloaded texture.
※the texture file of a combined mesh and terrain is not same. The texture of combined mesh follows the Mercator projection ,it retains most data of the downloaded files.

Data Source:

In the 2.0 version of RTM, you can use Google and Bing map service as the source of data. In v2.2 you can also use a Mapbox data..

1. The elevation and image of static maps have some difference in the two sources.
You can see the differences of static maps in the example scene 534-GalicicaNational.
2. The time the download processes take could be different with the two data source. It depends on your network condition.
3. Google and Bing map services have some limitations for their API users.

Read
https://msdn.microsoft.com/en-us/library/ff701724.aspx and https://www.microsoft.com/en-us/maps/licensing/options
https://developers.google.com/maps/pricing-and-plans/
https://www.mapbox.com/pricing/
For more details.

Random Map:

If you want to set the average height, drag median from 0 to 1 to set the median position between min and max.
The value of flat determines the approach degrees if the median value. Set flat to 0 to make barrows or hills, set flat to 1 to make a plain.
The value of scale determines the approach fluctuation. The lower the scale value is, the more gently the slopes go.
※ Do not set the scale close to the segment x or y, it's recommended to set a value less than (segment.x or y)/ 2.

Texture Types:

Four types of texture provided.

Google Map Types:
satellite	roadmap	terrain	hybrid
Bing Map Types:
Aerial	Road	CanvasGray	AerialWithLabels

Mapbox Types:
satellite	streets	streets-satellite	outdoors	comic

Texture Size:

You can choose AutoZoom or set the zoom level by yourself.
Read more about zoom level:
https://msdn.microsoft.com/en-us/library/ff701724.aspx
https://developers.google.com/maps/documentation/static-maps/intro#Zoomlevels
https://www.mapbox.com/api-documentation/pages/static_classic.html

When the Auto Zoom is checked, the zoom level will be the maximum according to the reference texture size.
There are some different selections when you use Google or Bing services.

	Google and Mapbox provide a larger image scale while loading a texture file. Notice that there are limits for both free user and upgrade users, if the texture size, zoom level or image scale exceeds the limits, the picture downloaded might be wrong, or the download may get errors. When the Autozoom is unchecked, you can set the zoom level by yourself.
	The zoom level is an integer between 0 and 21. Some image may not be available at all zoom levels for all locations. If it is not available at a location, the download may get errors.

Styles:

smooth style

basic matrial

Preview and Template:

It's usually needed to have a quick load to see whether the certain area can be generated correctly. click [+] , and select a template, the piece and segment will be set to a lower value to save time. There also provide many templates for some common setting.

You can also have a try with an example location.

¶ Mesh Size Type:

Auto: The ratio of length to width is base on the target location. Width/Length=DistanceEW / DistanceNS
Square: Generate square terrain mesh.Width = Length
Custom: customize the length and width of mesh.

※The type of Mesh size controls only the size of Gameobject. It will not affect the geographical region.

¶ Center Mode Adv Setting:

There are two calculation methods of Meshsize and the geographical region.
example:
While MeshsizeType is Auto and Same lat/lng span, the value of Distance(EW) will be DistanceNS*Cos(lat).

Diagnosis Tool:

If you found RTM works not correctly, the diagnosis tool might help to find which problem you have got. Click Start Test, the diagnosis tool will test your API keys, the staticmap service, and the elevation service, and output the result.
The result will show what caused the incorrect work, read the Google and Bing API documents to fix it, or copy the log and send it to me.
※The log contains your API keys, it 's better to delete them before you show your log to others.※

Height Map Generate/Import:

After generating a piece of terrain, one height map picture will be saved in the texture directory.


Use the Generate From Height Map to rebuild a mesh with a height map.

The Importer Setting of a height map must:
Non-Power of 2: none
Read/Write enabled
Warp mode: Clamp
Filter Mode: point
Remember to check the texture import settings in your unity editor when you want to use a height which is not generated by RealTerrainMaker.

Select a heightmap texture into the texture field, the segment and meshsize will be load from the texture file automatically.

You can set your own mesh size instead of the default value, x as east-west and z as north-south.
Click Get Setting to reload the default value of meshsize and height from the texture file. Click Generate to make a new mesh from the heightmap.

In the version 2.2, you can generate terrain with a heightmap texture which is downloaded from Mapbox. Mind the value of segment x and y, the default value will the same as the texture width and height. Set segment x and y to an acceptable value before generate. The heightmap of Mapbox does not contain the meshsize and heightscale setting, it's better to use the default value and adjust the scale of Gameobject.
The algorism of heightmap is changed in v2.2, the result which is generated with an old version heightmap will not same as the original terrain.