Creating Custom Height Map Mask

In theory, a Height Map Terrain is composed of one terrain mesh covered with up to 4 materials. The distribution for the materials are determined by a Height Map Mask image file in PNG format, also known as Detailmap in Earth Sculptor.

Although the mask is an image, you can not open it in image editor to adjust the distributions. You must use Earth Sculptor to edit or generate the mask image instead.

The Basic Concept of Detailmap

When you decide to cover your terrain with Detailmap, you may assume that there are two invisible image plans hanging above the terrain mesh, one is the texture image and the other is the mask plane.

When you paint on the terrain mesh, you are actually modifying the mask plane so the texture plane may project texture accordingly onto the terrain.

Creating a Material Mask in Earth Sculptor

1. In Earth Sculptor, create a new terrain.
   
2. In the Main Menu, execute the Import >> Heightmap Image command and load a grayscale image.
   
3. Press down the Detail button in the Toolbar. Detail panel shows.
   
4. Click the Set Detail Texture button. Locate a desired image (TGA, DDS, PNG or BMP) and click the Open button to load the image to replace the original one (check board).
   • For channel 1, the target image tiles the entire terrain as soon as it is loaded since the mask is off.
     
   • For channel 2, 3 and 4, the target images are masked out. You must paint on the terrain to modify the masks to determine the distributions of the textures.
     
   • After painting for the 4 materials, you will get a terrain with detailed textures.
     
     
     Note:

     Please note that the change of Scale value for tiling the texture in Earth Sculptor does not affect the real UV Tiling results in iClone.
     

Obtaining Height Map and Material Mask Images for iClone

Finding Required Images in Earth Sculptor

After you have created a new terrain with 4 materials as described in the previous section, you may then import the Height Map and Mask images to iClone, in order to create you custom height map terrain.

1. Take the terrain created above as an example (in Earth Sculptor).
   
2. Save the terrain as *.map file (Earth Sculptor project file).
3. Execute the Utility >> Explore command from the main menu.
   
4. A system explorer will open the folder where you save the project. You will see several images inside of it.
   
   • *.map: The Earth Sculptor project file.
   • *.png: The Height Map image for creating the landforms.
   • *_c.png: The color layer image that overlapping on the terrain.
   • *_d.png: The Detailmap (Height Map Mask) image file.
   • *_l.png: The light map image for simulating the light and shadow effects.
   * Please not that only the *.png and *_d.png are necessary for creating a custom height map terrain in iClone.

Loading Height Map and Mask Images in iClone

1. Load a Height Map Terrain template from the Content Manager >> Set tab >> Terrain library >> Height Map_Large library as a base.
   
2. In this case, the Butte is applied.
   
3. Select the terrain in the Scene Manager, and switch to its attribute tab in the Modify panel.
   
4. Double click on the Height Map channel and replace the original image with the *.png (for generating landforms) as described above.
   
5. Double click on the Mask channel and replace the original image with the *_d.png as described above.
   
   
   Note:

   • The material that is applied to a specific color area defined in the original mask will be applied to the same color area defined in the loaded mask.
     
   • It is not recommended to use an image editor to adjust the mask image map, as material distribution may not be accurate, and may not reflect the smooth blending between textures.
     

Re-arranging Materials

If you are not satisfied with the material results, you can manually adjust it further via the controllers in iClone.

1. Switch to the Material tab in the Modify panel.
   
2. Click the Picker button and click on the desired area for retrieving its corresponding material.
   
3. Click the Save button to save the material as a file.
4. Repeat the same steps to save the 4 materials.
5. Click on the Picker button again.
6. Click on the terrain to select a target area for changing material.
   
7. Click the Load button to load the desired material file saved in step 4.
   
8. Repeat the same steps to adjust and change the materials.