Illum Shader

Overview

The Illum Shader is the most commonly used shader. It can be used to create an extremely wide variety of effects. If there is no specific shader for the type of effect you are trying to achieve, use the Illum Shader.

Shader Parameters

Parameter	Description	Shader Gen Option
Emittance Map Gamma	Expands the lower range of emittance texture and allows darker colors to be interpreted as even less bright. This can be necessary to make a strongly emissive surface/object like a flame appear smooth. (1.0: Original range, 2.0: Maximum range)	Default
Blend Factor	Controls the visibility of the blended layer. To use this parameter, you must enable Blendlayer in the Shader Generation Parameters.	Blend Layer
Blend Falloff	Controlsblendingfalloff. To use this parameter, you must enable Blendlayer in the Shader Generation Parameters.	Blend Layer
Blend Layer 2 Spec	Controls specular intensity of the second blend layer. To use this parameter, you must enable Blendlayer in the Shader Generation Parameters.	Blend Layer
Blend Layer 2 Tiling	Controls tiling of the second blend layer. To use this parameter, you must enable Blendlayer in the Shader Generation Parameters.	Blend Layer
Blend Mask Tiling	Controls tiling of the blend mask. To use this parameter, you must enable Blendlayer in the Shader Generation Parameters.	Blend Layer
Decal Alpha Falloff	Pow applied to decal alpha.	Decal
Decal Alpha Multiplier	Multiplier applied to decal alpha.	Decal
Decal Diffuse Opacity	Opacity multiplier for fading out decal diffuse color.	Decal
Detail Bump Scale	Sets detail bump scale. To use this parameter, you must enable Detail Mapping in the Shader Generation Parameters.	Detail Mapping
Detail Diffuse Scale	Sets diffuse detail blend scale. To use this parameter, you must enable Detail Mapping in the Shader Generation Parameters.	Detail Mapping
Detail Gloss Scale	Sets gloss detail blend scale. To use this parameter, you must enable Detail Mapping in the Shader Generation Parameters.	Detail Mapping
Height Bias	Controls the height bias. To use this parameter, you must enable Parallax Occlusion Mapping in the Shader Generation Parameters. See Parallax Occlusion Mapping for more information.	OBM/POM/SilPOM
Indirect Bounce Color	Modulates the bounced light from Global Illumination. Left: Default 136,136,136 setting. Right: 0,255,0 setting. Both exaggerated.	Default (Global Illumination)
OBM Displacement	Controls the amount of displacement for offset bump mapping (OBM). To use this parameter, you must enable Offset bump mapping in the Shader Generation Parameters.	Offset bump mapping
POM Displacement	Controls the amount of displacement for parallax occlusion mapping (POM). To use this parameter, you must enable Parallax Occlusion Mapping in the Shader Generation Parameters. See Parallax Occlusion Mapping for more information.	Parallax Occlusion Mapping
Self Shadow Strength	Allows movable objects, such as interactive objects or game characters, to cast shadows on themselves and each other. To use this parameter, you must enable Parallax occlusion mapping in the Shader Generation Parameters. See Parallax Occlusion Mapping for more information.	Parallax Occlusion Mapping
SSS Index	Subsurface Scattering Index. Integer and Fractal usage are applicable. 0 to disable. 0.01 - 0.99 for Marble. 1.00 - 1.99 for Skin. 3-4 are reserved for future use. Left: SSS disabled value of 0. Right: SSS value at 0.99 to simulate Marble scattering.	Default

Shader Generation Parameters

Parameter	Description
Detail mapping	Add micro and macro details to the material surface. See Detail Mapping - Shader Generation Params for more information.
Offset bump mapping	Enables offset bump mapping. This option requires a heightmap, which you can select for the Normal Map option under the Texture Maps heading.
Vertex Colors	Allows the use of fake ambient occlusion by using vertex colors or adds a bit more depth and contrast to the 3D model. Vertex colors have to be added to the geometry in the 3D modeling software.
Decal	Activate this function if you use a Decal. Decal planes are normally placed very close to other geometry. By activating a decal, you can avoid typical problems like flickering and z-fighting when faces are close to each other. The decal position will be adjusted and the render priority changed. For more information please see Decals.
Parallax occlusion mapping	Enables parallax occlusion mapping. This option requires a heightmap, which you can select for the Normal Map option under the Texture Maps heading. See Parallax Occlusion Mapping for more information.
Displacement mapping	Enables displacement mapping. This option requires a heightmap, which you can select for the Normal Map option under the Texture Maps heading.
Phong tessellation	Enables the rough approximation of smooth surface subdivision.
PN triangles tessellation	Enables the rough approximation of smooth surface subdivision.
Blendlayer	Enables the blending of the normal-mapped diffuse layer on top of the base material.
DetailMap mask in Diffuse alpha	Allow the artist to use the alpha channel in RGBA texture map to mask the decal.
Silhouette POM	Enables parallax occlusion mapping with silhouettes. This option requires a heightmap, which you can select for the Normal Map option under the Texture Maps heading.

Shader Parameters

Shader Generation Parameters