<layering_technique> Element
This element controls the method that osgEarth uses to composite image layers.
Values
| composite | Composites image tiles using the GPU. This technique places no limit on the number of image layers. It uses a Texture2DArray and a shader to composite image tiles on the GPU at run time. It requires graphics hardware that supports the GL_TEXTURE_2D_ARRAY_EXT extension. |
| multipass | Composites imagery by making multiple rendering passes over the scene graph. This technique places no limit on the number of image layers you can have, but can affect performance since each additional layer means another rendering pass over the scene graph. |
| multitexture | Assigns each image layer to its own texture unit. You are limited by the number of available texture units on your graphics hardware. (This method is currently the default.) |
Example
<map>
<engine_properties>
<layering_technique>composite</layering_technique>
</engine_properties>
...
</map>
