unreal.TranslucencyLightingMode

class unreal.TranslucencyLightingMode

Bases: EnumBase

Describes how to handle lighting of translucent objets

C++ Source:

• Module: Engine

• File: EngineTypes.h

TLM_SURFACE: TranslucencyLightingMode

Lighting will be calculated for a surface. The light is accumulated in a volume so the result is blurry, limited distance but the per pixel cost is very low. Use this on translucent surfaces like glass and water. Only diffuse lighting is supported.

Type:

4

TLM_SURFACE_PER_PIXEL_LIGHTING: TranslucencyLightingMode

Lighting will be calculated for a surface. Use this on translucent surfaces like glass and water. This is implemented with forward shading so specular highlights from local lights are supported, however many deferred-only features are not. This is the most expensive translucency lighting method as each light’s contribution is computed per-pixel.

Type:

5

TLM_VOLUMETRIC_DIRECTIONAL: TranslucencyLightingMode

Lighting will be calculated for a volume, with directionality so that the normal of the material is taken into account. Note that the default particle tangent space is facing the camera, so enable bGenerateSphericalParticleNormals to get a more useful tangent space.

Type:

1

TLM_VOLUMETRIC_NON_DIRECTIONAL: TranslucencyLightingMode

Lighting will be calculated for a volume, without directionality. Use this on particle effects like smoke and dust. This is the cheapest per-pixel lighting method, however the material normal is not taken into account.

Type:

0

TLM_VOLUMETRIC_PER_VERTEX_DIRECTIONAL: TranslucencyLightingMode

Same as Volumetric Directional, but lighting is only evaluated at vertices so the pixel shader cost is significantly less. Note that lighting still comes from a volume texture, so it is limited in range. Directional lights become unshadowed in the distance.

Type:

3

TLM_VOLUMETRIC_PER_VERTEX_NON_DIRECTIONAL: TranslucencyLightingMode

Same as Volumetric Non Directional, but lighting is only evaluated at vertices so the pixel shader cost is significantly less. Note that lighting still comes from a volume texture, so it is limited in range. Directional lights become unshadowed in the distance.

Type:

2