Please note that this documentation space offers information for V-Ray 3.6! For most up-to-date documentation, refer to V-Ray Next for Modo help.

This page provides information on the features supported by V-Ray RT GPU.

 

Page Contents

 


Overview


This section lists RT GPU CUDA support for V-Ray specific features in Modo. The information here pertains to the latest official build of V-Ray for Modo.

For RT GPU CUDA support of Modo native features, please check the Modo Compatibility page.

Features marked as NIGHTLY are available only in the nightly builds.

 

V-Ray Atmospheres


FeatureV-Ray RT GPUAdditional Notes
V-Ray Environment Fog

  –

 
V-Ray Aerial Perspective

  ✓

 
V-Ray Toon

 

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V-Ray Geometry


FeatureV-Ray RT GPUAdditional Notes
V-Ray Clipper 
V-Ray Proxy
Triangular meshes, hair and particles from Alembic (.abc) files are also supported.
V-Ray Volume Grid
 
V-Ray FurPARTIAL

Multiple materials on one V-Ray Fur item is not supported in RT GPU

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V-Ray Materials


FeatureV-Ray RT GPUAdditional Notes
V-Ray 2-Sided MaterialPARTIAL
  • The opacity of sub-materials will not work.
  • Multiply By Front diffuse is not supported.
V-Ray alSurface 
V-Ray Blend Material

The additive mode option is always considered OFF.

V-Ray Car Paint
 
V-Ray Fast SSS2

PARTIAL

RT GPU always uses raytraced multiple scattering. It does not support raytraced (solid) and raytraced (refractive) settings.

V-Ray Flakes
PARTIAL
 
V-Ray Hair
 
V-Ray Light Mtl

PARTIAL

Opacity is not supported.

V-Ray Material

PARTIAL

Glossy Fresnel, Translucency, Diffuse Roughness, Dispersion, and Fog Bias are not supported.

V-Ray Override Material

PARTIAL

Environment override is not supported.
V-Ray Point Particle Material
 
V-Ray Skin
 
V-Ray Stochastic Flakes
 
V-Ray Switch Material
 
V-Ray VRmat

The VRmat can store different types of materials, so support

depends on the type of the stored material.

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Rendering Global options


Feature

V-Ray RT GPU

Additional Notes

Enable displacement

 

Use lights

 

Use hidden lights

 

Don't render final image

 

Use global max depth

 

Enable probabilistic lights

 

Render hidden geometry

 

Shadows

 

Show GI only

 

Disable self-illumination

 

Reflection/Refraction

 

Glossy effects

 

SSS enabled

 

Maps

 

Filter maps 
Filter maps for glossy/GI rays 
Uninverted normal bump 
Force back face culling 
Clamp max ray intensity 
Probabilistic volumetrics 

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V-Ray Textures


Textures marked as BAKED are baked on the CPU and sent to RT GPU as a bitmap.

The bake resolution is specified in the Render item under V-Ray RT, Performance -> GPU Texture Size.

These textures are baked in the [0,1] x [0,1] UV range, which means they will repeat outside of this range.

All BAKED textures can be used for bump mapping.

V-Ray Textures sub-menu

FeatureV-Ray RT GPUAdditional Notes
V-Ray Curvature
 
V-Ray Dirt
PARTIAL
Some parameters are not supported.
V-Ray Distance
 
V-Ray Edges
PARTIAL
Show Hidden Edges and Show Subtriangles not currently available on the GPU.
V-Ray Falloff

 
V-Ray Fresnel
 
V-Ray Hair Variation
Works with hair generated by the Modo Fur Material or hair from a V-Ray Proxy item.
V-Ray Layered
 
V-Ray Multi Sub
 
V-Ray OSL 
V-Ray PTex

 
V-Ray Ray Switch

 
V-Ray Softbox

BAKED

 
V-Ray Triplanar
Supports bitmaps only.

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V-Ray Textures Bercon sub-menu

FeatureV-Ray RT GPUAdditional Notes
V-Ray Bercon Noise
BAKED
 
V-Ray Bercon Tile
BAKED
 
V-Ray Bercon Wood
BAKED
 

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V-Ray Textures Procedural sub-menu

FeatureV-Ray RT GPUAdditional Notes
V-Ray Bulge
BAKED
 
V-Ray Cellular

 
V-Ray Checker

 
V-Ray Cloth
BAKED
 
V-Ray Granite
BAKED
 
V-Ray Grid
BAKED
 
V-Ray Leather
BAKED
 
V-Ray Marble
BAKED
 
V-Ray Marble Simple
BAKED
 
V-Ray Noise
 
V-Ray Rock
BAKED
 
V-Ray Smoke
BAKED
 
V-Ray Snow

 
V-Ray Speckle
BAKED
 
V-Ray SplatBAKED 
V-Ray StuccoBAKED 
V-Ray SwirlBAKED 
V-Ray TilesBAKED 
V-Ray Water

 

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V-Ray Utilities sub-menu

FeatureV-Ray RT GPUAdditional Notes
V-Ray 3-Color Gradient
BAKED
 
V-Ray Blend Normal Maps

 
V-Ray Color Correct

 
V-Ray Color Correction
 
V-Ray Mix
 
V-Ray RGB Tint

 

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V-Ray Packages


FeatureV-Ray RT GPUAdditional Notes

V-Ray Object Properties

 

V-Ray Physical Camera

 

V-Ray Sun / Sky

 
V-Ray Motion Samples 

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V-Ray Geometry Properties

FeatureV-Ray RT GPUAdditional Notes
Object ID
You can combine this with the V-Ray Multi Sub texture to create material variations in RT GPU.
Modo to V-Ray
Computed on the CPU.
OpenSubdiv
Computed on the CPU.
V-Ray Subdivision
Computed on the CPU.
V-Ray Displacement
Computed on the CPU. 2D Displacement mode is NOT supported in RT GPU.
Motion Blur Samples
 

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V-Ray Light Settings

FeatureV-Ray RT GPUAdditional Notes
Photon Emission

 
Shadow Bias
 
Cut-off threshold

 
Invisible
 
Affect diffuse
 
Affect specular
 
Affect reflections
 
Bumped normal check

 
Store with irradiance map

 
Subdivs
N/A
 
Area / Dome light specific  
Use texture
 

Texture resolution

 
Adaptive texture sampling
 
Area light specific  
Directional

 
Light Mesh
Textures are not supported.
Dome light specific  
Dome Spherical
 
Point light specific  
Make spherical light
 
Spherical segments
 

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V-Ray Render Settings

FeatureV-Ray RT GPUAdditional Notes
Image Sampler

RT CPU and RT GPU always use a progressive image sampler,

its stop conditions can be modified from V-Ray RT, Performance -> RT Stop Conditions.

Anti-aliasing
 
Denoiser
Even when you are using the production V-Ray renderer or RT CPU, by default, denoising is computed using your GPU.
DMC Sampler
N/A
 
Color Mapping
 
Global Options
PARTIAL
The following channels are supported: Enable Displacement, Use Lights, Use Hidden Lights, Render Hidden Geometry.

Environment Importance

Sampling

 
GI - Brute Force
 
GI - Light Cache
 
GI - Irradiance Map
 
GI - Photon Map
 

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V-Ray Camera

FeatureV-Ray RT GPUAdditional Notes
V-Ray Camera Type Overrides
PARTIAL
Only the Standard, Orthogonal, Pinhole, Spherical Panorama and Cube 6x1 camera types are supported.
V-Ray Motion Blur Extra
PARTIAL
Bias and Shutter Efficiency are NOT supported.
V-Ray Stereoscopic Extra
PARTIAL
Only the Focus Method and Output Layout channels are supported.
V-Ray Clipping Plane Extra

The clipping plane is not supported in RT GPU.

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Render Elements


Modo Native

Basic Render Elements

Modo nameV-Ray NameV-Ray RT GPUAdditional Notes
DepthZ Depth
 
Motion VectorVelocity

 

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Geometry Render Elements

Modo nameV-Ray NameV-Ray RT GPUAdditional Notes
dPdu VectordPdu Vector

 
dPdv VectordPdv Vector

 
Geometric NormalGeometric Normal

 
Object CoordinatesObject Coordinates

 
Shading IncidenceShading Incidence
 
Shading NormalBump Normals

 
Surface IDSurface ID

 
UV CoordinatesUV Coordinates
 
World CoordinatesWorld Coordinates 

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Lighting Render Elements

Modo nameV-Ray NameV-Ray RT GPUAdditional Notes
Ambient OcclusionAmbient Occlusion
 
Illumination (Direct)Raw Lighting

 
Illumination (Indirect)Raw GI

 
Illumination (Total)Raw Total Light

 
Reflection OcclusionReflection Occlusion

 
Shadow DensityMatte Shadow

 

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Material Render Elements

Modo nameV-Ray NameV-Ray RT GPUAdditional Notes
Diffuse CoefficientDiffuse Filter
 
Reflection CoefficientReflection Filter
 
RoughnessReflection Roughness

 
Transparent ColorRefraction Filter
 

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Shading Render Elements

Modo nameV-Ray NameV-Ray RT GPUAdditional Notes
Diffuse Shading (Direct)Light
 
Diffuse Shading (Indirect)GI
 
Diffuse Shading (Total)Total Light

 
Luminous ShadingSelf Illumination
 
Reflection ShadingReflection
 
Shaded AA SamplesSample Rate
 
Specular ShadingSpecular
 
Subsurface ShadingSSS
 

Transparent Shading

Refraction
 

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V-Ray Specific

NameV-Ray RT GPUAdditional Notes
Light Select
GI, reflection and refraction included
Render Mask

 
Coverage 
Caustics 
Object ID 
Material ID 
Multi Matte 
Raw Shadow 
Background 
Atmospheric Effects 
Render ID 
Toon 
Shadow 
Cryptomatte 
Raw Diffuse Filter 
Raw Reflection 
Raw Reflection Filter 
Raw Refraction 
Raw Refraction Filter 

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V-Ray Frame Buffer (VFB)


The VFB effects (color corrections, lens effects, etc) are computed on the CPU after or during rendering, so they will work with RT GPU.