V-Ray for Unreal
Unreal Materials And Material Instances
This page provides information on the native Unreal Materials and Material Instances.
Last updated 25 February 2026
This page provides information on the native Unreal Materials and Material Instances.
Overview
V-Ray for Unreal support the rendering of native Unreal Materials and Material Instances. Materials are used to calculate how light interacts with surfaces. These calculations are done using incoming data that is input to the Material from a variety of images (textures) and math expressions, as well as from various property settings inherent to the Material itself. Each time a change is made in the material it has to recompile which can be very time consuming depending on the complexity of the shading graph. Material instancing is used to change the appearance of a Material without incurring an expensive recompilation of the Material using predefined parameters. For more information on Unreal Materials and Material Instances check the Materials documentation.
Supported Expressions
Below are listed the expressions in the Material Editor that are supported by V-Ray for Unreal.
Atmoshpere
Expression Name | Support |
|---|
Expression Name | Support |
|---|---|
AtmosphericFogColor | Not Supported |
Constants
Expression Name | Support |
|---|
Expression Name | Support |
|---|---|
Constant | Supported |
Constant2Vector | Supported |
Constant3Vector | Supported |
Constant4Vector | Supported |
DistanceCullFade | Not Supported |
ParticleColor | Not Supported |
ParticleDirection | Not Supported |
ParticleMotionBlurFade | Not Supported |
ParticleRadius | Not Supported |
ParticleRelativeTime | Not Supported |
ParticleSize | Not Supported |
ParticleSpeed | Not Supported |
PerInstanceFadeAmount | Not Supported |
PerInstanceRandom | Not Supported |
Time | Partial |
TwoSidedSign | Supported |
VertexColor | Supported |
View Property | Partial |
Precomputed AO Mask | Not Supported |
Coordinates
Expression Name | Support |
|---|
Expression Name | Support |
|---|---|
LightmapUVs | Not Supported |
ObjectRadius | Supported |
Panner | Supported |
ParticlePositionWS | Not Supported |
Rotator | Supported |
SceneTexelSize | Not Supported |
ScreenPosition | Supported |
TextureCoordinate | Partial |
ViewSize | Not Supported |
WorldPosition | Supported |
Custom
Expression Name | Support |
|---|
Expression Name | Support |
|---|---|
Custom | Not Supported |
Depth
Expression Name | Support |
|---|
Expression Name | Support |
|---|---|
DepthFade | Not Supported |
PixelDepth | Supported |
SceneDepth | Not Supported |
Function
Expression Name | Support |
|---|
Expression Name | Support |
|---|---|
FunctionInput | Supported |
FunctionOutput | Supported |
MaterialFunctionCall | Supported |
StaticBool | Supported |
StaticSwitch | Supported |
Material Attributes
Expression Name | Support |
|---|
Expression Name | Support |
|---|---|
BreakMaterialAttributes | Supported |
GetMaterialAttributes | Supported |
MakeMaterialAttributes | Supported |
SetMaterialAttributes | Supported |
Math
Expression Name | Support |
|---|
Expression Name | Support |
|---|---|
Abs | Supported |
Add | Supported |
AppendVector | Supported |
Arccosine | Supported |
ArccosineFast | Partial |
Arcsine | Supported |
ArcsineFast | Partial |
Arctangent | Supported |
Arctangent2 | Supported |
Arctangent2fast | Partial |
ArctangentFast | Partial |
Ceil | Supported |
Clamp | Supported |
ComponentMask | Supported |
Cosine | Supported |
CrossProduct | Supported |
Divide | Supported |
DotProduct | Supported |
Floor | Supported |
Fmod | Supported |
Frac | Supported |
If | Supported |
LinearInterpolate | Supported |
Logarithm10 | Not Supported |
Logarithm2 | Supported |
Max | Supported |
Min | Supported |
Multiply | Supported |
Normalize | Supported |
OneMinus | Supported |
Power | Supported |
Round | Supported |
Saturate | Supported |
Sign | Supported |
Sine | Supported |
SquareRoot | Supported |
Subtract | Supported |
Tangent | Supported |
Truncate | Supported |
Parameters
Expression Name | Support |
|---|
Expression Name | Support |
|---|---|
CollectionParameters | Not Supported |
DynamicParameter | Not Supported |
FontSampleParameter | Not Supported |
ScalarParameter | Supported |
StaticBoolParameter | Supported |
StaticSwitchParameter | Supported |
StaticComponentMaskParameter | Not Supported |
VectorParameter | Supported |
TextureObjectParameter | Supported |
TextureSampleParameter2D | Supported |
TextureSampleParameterSubUV | Not Supported |
TextureSampleParameterCube | Not Supported |
TextureSampleParameterMovie | Not Supported |
Particles
Expression Name | Support |
|---|
Expression Name | Support |
|---|---|
DynamicParameter | Not Supported |
ParticleColor | Not Supported |
ParticleDirection | Not Supported |
ParticleMacroUV | Not Supported |
ParticleMotionBlurFade | Not Supported |
ParticlePositionWS | Not Supported |
ParticleRadius | Not Supported |
ParticleRelativeTime | Not Supported |
ParticleSize | Not Supported |
ParticleSpeed | Not Supported |
SphericalParticleOpacity | Not Supported |
ParticleSubUV | Not Supported |
Terrain
Expression Name | Support |
|---|
Expression Name | Support |
|---|---|
LanscapeLayerBlend | Not Supported |
LandscapeLayerCoords | Not Supported |
LandscapeLayerSwitch | Not Supported |
LandscapeLayerWeight | Not Supported |
LanscapeVisibilityMask | Not Supported |
Texture
Expression Name | Support |
|---|
Expression Name | Support |
|---|---|
FontSample | Not Supported |
SceneColor | Not Supported |
SpriteTrextureSampler | Not Supported |
TextureObject | Supported |
TextureSample | Supported |
TextureProperty | Not Supported |
Utility
Expression Name | Support |
|---|
Expression Name | Support |
|---|---|
AntialiasedTextureMask | Not Supported |
BlackBody | Not Supported |
BumpOffset | Supported |
ConstantBiasScale | Supported |
DDX | Partial |
DDY | Partial |
DepthOfFieldFunction | Not Supported |
Desaturation | Supported |
Distance | Supported |
DistanceFieldGradient | Not Supported |
DistanceToNearestSurface | Not Supported |
FeatureLevelSwitch | Not Supported |
Fresnel | Supported |
GIReplace | Not Supported |
LightmassReplace | Not Supported |
Noise | Not Supported |
PreviousFrameSwitch | Not Supported |
QualitySwitch | Not Supported |
RayTracingQualitySwitch | Partial |
RotateAboutAxis | Supported |
SphereMask | Supported |
Vector Noise | Not Supported |
VectorOps
Expression Name | Support |
|---|
Expression Name | Support |
|---|---|
ActorPositionWS | Not Supported |
CameraPositionWS | Supported |
CameraVectorWS | Supported |
DeriveNormalZ | Not Supported |
LightVector | Not Supported |
ObjectBounds | Not Supported |
ObjectOrientation | Not Supported |
ObjectPositionWS | Supported |
ParticlePositionWS | Not Supported |
PixelNormalWS | Supported |
Pre-Skinned Local Normal | Not Supported |
Pre-Skinned Local Position | Not Supported |
ReflectionVectorWS | Supported |
Transform | Supported |
TransformPosition | Partial |
VertexNormalWS | Supported |
Supported Material Inputs, Blend Modes and Shading Models
Below are listed all inputs, Blend modes and Shading models in the Material Editor that are supported by V-Ray for Unreal.
Inputs |
|---|
Inputs | |
|---|---|
Base Color | Supported |
Metallic | Supported |
Specular | Supported |
Roughness | Supported |
Emissive Color | Supported |
Opacity | Supported |
Opacity Mask | Supported |
Normal | Supported |
World Position Offset | Not Supported |
World Displacement | Not Supported |
Tessellation Multiplier | Not Supported |
Subsurface Color | Supported |
Clear Coat | Supported |
Clear Coat Roughness | Supported |
Ambient Occlusion | Not Supported |
Refraction | Not Supported |
Pixel Depth Offset | Not Supported |
Shading Model | Not Supported |
ClearCoatBottomNormal | Supported |
Click here to expand for screenshot of UI
Blend Modes |
|---|
Blend Modes | |
|---|---|
Opaque | Supported |
Masked | Supported |
Translucent | Supported |
Additive | Not Supported |
Modulate | Not Supported |
Alpha Composite | Supported |
Click here to expand for screenshot of UI
Shading Modes |
|---|
Shading Modes | |
|---|---|
Unlit | Supported |
Default Lit | Supported |
Subsurface | Supported |
Preintegrated Skin | Not Supported |
Clear Coat | Supported |
Subsurface Profile | Not Supported |
Two Sided Foliage | Supported |
Hair | Not Supported |
Cloth | Not Supported |
Eye | Not Supported |
Click here to expand for screenshot of UI
