Terrain.Layer Shader

Open 3D Engine (O3DE), the successor to Lumberyard, is now available in Developer Preview. Download O3DE or visit the AWS Game Tech blog to learn more.

The Terrain.Layer shader is used for painting and blending terrain texture layers in a level. Besides needing a bump map and high-passed diffuse map, the Terrain.Layer shader also requires a height map with either offset bump mapping (OBM) or parallax occlusion mapping (POM) enabled. Blending uses the height map to determine how the materials blend together. For example, if you have pebbles on one material and dirt as another, you may want the pebbles to accurately stand out from the dirt.

Here are a few notes regarding usage of this shader:

• The Detail normals texture is not an external texture, but rather a texture generated by Lumberyard through code.

• The Decal parameters don't appear under Shader Params unless you put a texture into the Decal slot first. The Decal Bumpmap slot also appears after this task.

• Flow map textures go in the Detail slot.

Shader Parameters

Blend Factor

Changes the visibility of the blended layer. A height map is required. OBM or OBM shader generation parameter must be enabled first.

Default value: 0

Blend Falloff

Changes the falloff of blending. A height map is required. OBM or OBM shader generation parameter must be enabled first.

Default value: 1

Detail bump scale

Detail mapping shader generation parameter must be enabled first.

Default value:

Detail gloss scale

Detail mapping shader generation parameter must be enabled first.

Default value:

DetailTextureStrength

Sets the strength of the diffuse map, which dictates how much detail texture is visible over the layer texture. The higher the value, the more you see only your Diffuse map.

Default value: 1

Height bias

POM shader generation parameter must be enabled first.

Default value: 0.5

Indirect bounce color

Sets the amount of indirectly bounced color

Default value: 136,136,136

Default value:

OBM Displacement

OBM shader generation parameter must be enabled first.

Default value: 0.01

POM Displacement

POM shader generation parameter must be enabled first.

Default value: 0.01

Self shadow strength

POM shader generation parameter must be enabled first.

Default value: 3

Shader Generation Parameters

Offset bump mapping (OBM)

Uses offset bump mapping. Requires a height map (_displ format).

Detail mapping

Uses detail mapping.

Parallax occlusion mapping (POM)

Uses parallax occlusion mapping. Requires a height map (_displ format).