New features

---

V-Ray

• Support for 3ds Max 2021

• Support for "Bake to Texture" in 3ds Max 2021

Modified features

---

V-Ray

• Improve performance scaling with 2nd gen Epyc dual 64-core setups 128 and more threads

• Look for the XML file with the view graph for viewport IPR relative to the vrenderNNNN.dlr file location

VRayScene

• Matte and Visibility control;

VRayOSL

• Add the ability to connect an OSL triple float output to a OSL single float input

VFB

• Add MaxScript control for Test resolution through vfbcontrol

.vrscene exporter

• Update SettingsPresenZ export

Bug fixes

---

V-Ray

• 3ds Max frame buffer has the same resolution as VFB regardless of the "Get resolution from Max option"

• Any click on the Light Cache preset dropdown changes the mode

• Crash after baking to texture in 3ds Max 2021

• EXR metadata in the VRayOptionRE is not saved with deep images

• Fume FX render elements are missing in V-Ray renders

• Random crash when rendering scene with VRayFur

• Tiled EXR textures cause specific scene to render considerably slower compared to 4.1

• VRayRenderID by node handle is not saved correctly in deep EXR output

• Wrong 3ds Max Render output JPEG image with Test resolution

V-Ray, V-Ray GPU

• Incorrect internal reflection in glass when glossy Fresnel is enabled

V-Ray IPR

• Deleting/updating VRayInstancer or assigned materials won't cleanup material-clones-bindings and would lead to crash

V-Ray GPU/V-Ray Cloud

• Anima AXYZ no animation when exported to vrscene

• BerconMapping doesn't render properly when exported to Standalone

• Different result for BerconNoise in Standalone with some combinations of Noise Function and Fractal

• Tile UV mapping of the Bercon tile is not rendered properly

• VRayMtlID render element renders black

V-Ray GPU

• Bucket rendering produces black output when AA Filter size drops below 1.41

• Crash when rendering VRMesh files with more than 16 mapping channels

• Crash with VRayLightMtl with Direct illumination enabled, applied to tySpline

• Crash with VRayEnvironmentFog when switching from bucket to IPR between consecutive renderings

• Rendering on GPU with NVLink spanning more than 2 cards results in a crash

• VRayMtl is missing glossy reflections on the back side if "Reflect on back side" is enabled

V-Ray Standalone

• -skipExistingFrames breaks file output to current directory

• -skipExistingFrames creates extra files in animation

VRayEnvironmentFog

• Artifacts with custom geometry fog gizmo in a specific scene

• Can not render with VRayNoiseTex used as density map

• Renders significantly slower with Scatter GI in V-Ray Next

VRayFastSSS2

• Material does not compose back to beauty properly

• VRayLightSelect in full mode does not match beauty pass when diffuse amount is above 0

VRayGLSL

• Float to int vector casts in shaders lead to crashes

• Incorrect matrix multiplication results

• Missing return statements in non-void GLSL functions lead to crashes

VRayMtl

• 100% white Opacity Map affects material Reflections

VRayOSL

• Crash in material editor preview rendering after editing OSL texture from MaxScript

• Crash with Bitmap texture vrayattached to VRayOSLTex while exporting for V-Ray GPU

VRayScene

• Compiling geometry time is increasing with each frame in animation rendering with V-Ray Standalone

VRayVolumeGrid

• Volumetric rendering slow-down with Volume Light Cache enabled with V-Ray memtracker

Modified features

---

V-Ray

• Print a warning when having memory frame buffer disabled and no output directory set

.vrscene exporter

• Export Check for missing assets option

Installer

• Update Chaos License Server to 5.3.0 if needed

Bug fixes

---

V-Ray

• Artifacts with the Adaptive dome and trace sets

• Bitmaps are not loaded for VRayInstancer in IPR if its source object is hidden

• Thousands of warnings for invalid geometric normal flood on geometry shaded with hair material

V-Ray GPU

• Bitmaps are uploaded on every IPR update

• Crash in IPR with On-demand mip-mapping mode when a Bitmap is linked to VRayMtl's Self-illumination

• Crash with RTX in IPR mode when VRayFur source geometry is deleted

• CUDA error 700 with UDIM textures for the last tiles

• High CPU usage when rendering with RTX on

• Incorrect VRaySpecular render element with VRayHairNextMtl (regression since 4.30.00)

• IFL textures do not load properly in IPR when OptiX on demand textures are used

• Incorrect normals calculation with VRayMtl's Displacement

• Show "Camera Map Per Pixel" map as compatible

• Square artifacts in specular element in bucket mode with specific scene

• Square artifacts with adaptive dome light

• V-Ray Light Lister causes IPR to render black in specific scene with Skylight

V-Ray GPU/V-Ray Cloud

• VRayALSurfaceMtl General and Diffuse bump maps render the illuminated parts darker

VFB

• Main window closes after IPR stop with 3ds Max 2016 and older (since 4.30.00)

VRayHDRI

• The "Filter mult" parameter has no effect on bump maps

VRayOrnatrixMod

• Crash with motion blur and dynamic tessellation

VRayALSurfaceMtl

• No Caustics received when sss mix is set to 1

• Artifacts with Adaptive lights and Caustics

New features

---

V-Ray

• Add a renderer parameter "options_useColorSpaceForBitmaps" that tells all VRayHDRI maps to determine the color space from the file name

V-Ray GPU

• Add support for RT cores of NVIDIA RTX cards

• Add support for disabled "Memory frame buffer"

• Support for Deep EXR output

V-Ray Cloud

• Add the Chaos Cloud client app installer to the V-Ray for 3ds Max installer

VRayHDRI

• Add a sharp isotropic texture filtering method

• Allow UVW coordinates to be controlled through another map

• Add a "Filter mult" parameter to control the blur separately when mapping coordinates are taken from another texture

VRayOSL

• Add the ability for normal texture maps to be a part of a shading graph in OSL for 3ds Max

VRayVolumeGrid

• Added support for Volumetric and Mesh mode rendering of the new TexUVW Phoenix FD channel

vrscene exporter

• Export material IDs of materials used in VRayBlendMtl

Modified features

---

VRayLight

• Improved sampling of directional lights

V-Ray

• Adaptive dome VRayLight support for Light Cache from file

• Add "Animation" and "Still" presets for the Light cache

• Change the default values of the Progressive image sampler: Render time - 0; Noise threshold - 0.01

• Multi-threaded execution of OpenEXR compression and decompression to improve performance

• Update Embree to v3.2.0

• Update OpenEXR to v2.3.0

• Render Raytrace material as black to mitigate problems with it

V-Ray IPR

• Add GI contribution to the Isolate Selected objects in Debug Shading

V-Ray GPU

• Implement pre-multiplied Light cache that enables optimization of shading calculations on some scenes

• Implement debug shading for selected sub-materials

• Improved user-defined shaders (GLSL, MDL etc.) compilation

• Optimize mesh transfers to multiple devices

V-Ray Cloud/V-Ray Standalone

• Optimize rendering of Multi/Sub-Object material

VRayALSurfaceMtl

• Implement bump shadowing

• SSS is not computed for materials seen through glossy refraction

VRayStochasticFlakesMtl

• Stochastic flakes are not visible through glossy refraction

VRayCompTex

• Add "Mix amount" option to control texmap mix ratios

VRayDiffuseFilter/VRayReflectionFilter/VRayRefractionFilter

• Remove the "color mapping" option

VRayExtraTex

• Add an option to disable lossy DWAA/DWAB compression for a render element

VRayMtl

• Rearrange the texmap slots

VRayOSL

• Add tooltips on texmap buttons, spinners and combo boxes for shader tweaks

• Show shader description and help URL button if either is present

VRayProxy

• Improve errors logging

VRaySamplerInfo

• The render element should always be saved with lossless compression

VRayVolumeGrid

• Speed up loading of VDB caches by reading their min-max channel ranges from metadata instead of calculating them

• Equalize UVW coordinates of Phoenix Isosurfaces with those of the corresponding Meshes

VFB

• Add "Save in image" option to OCIO color corrections, to save the corrected image

• Add sliders for Lens effects' "Intensity" and "Threshold" parameters

• Enable setting of the render region via MAXScript outside the default resolution before rendering

• Read the saved window position only for the initial render and use the last valid position afterwards

• UI improvements for the VFB Lens Effects panel

V-Ray scene converter

• Convert Raytrace maps to VRayColor

Bug fixes

---

V-Ray

• Artifacts and flickering with "Hash map" Light cache in certain situations

• Artifacts when using Adaptive dome light and VRayFur with VRayMtl on it

• Artifacts with Adaptive dome and VRayToon

• Crash in scenes with meshes with Point Cache modifier that are used in Forest Pro in animated mode

• Bright spots in VRayGlobalIllumination render element with Falloff map in Shadow/Light mode

• Compositing results don't match with matte reflections if "Consistent lighting elements" is enabled

• Lighting elements are not propagated through refractions with "Consistent lighting elements" enabled

• Matte objects are present in the alpha channel when rendered through refractive objects

• Memory tracking "GI" tag replaces "Misc." when rendering with Global illumination

• Physical Material with black reflections has dark outlines

• The UI menus are active during rendering in 3ds Max 2020

• Unhandled exception when having a PF Source with Mapping Object operator

• Using camera clipping planes makes the dome light invisible

• VRayEdgesTex always draws hidden edges when used as displacement texture

• Wrong 3ds Max Render output JPEG image with Test resolution

V-Ray/V-Ray GPU

• Artifacts with Adaptive dome light with "affect reflections" disabled

VRayProxy

• Wrong defocusAmount denoise element on proxy objects leading to artifacts when denoising

• Face/Material IDs are offset with one when loading Alembic files

VFB

• Wrong resolution when rendering a sequence with Test resolution and DR

• Certain integer render elements are not displayed when loading EXR files

• Crash when changing OCIO settings (View transform, Input colorspace) during Viewport IPR

• History details comment is drawn over the previous one if changed via MAXScript

• The scrollbar in the Color Corrections window hides some of the text

• UI is not responsive with ICC color correction during IPR with V-Ray GPU

V-Ray IPR

• Crash when adding materials with VRayHDRI to a material library

• Crash while scrubbing the timeline with VRayLightMtl in the scene

• Crash with VRayOSL shading graph and VRayLightMtl with Direct illumination on

• Crash with VRaySky texmap and Hair and Fur

• Debug Shading's Isolate Selected mode doesn't work correctly for objects with opacity

• Loops on building Light cache in a scene with VRayDistanceTex and Forest Pro

• Starting production rendering during Viewport IPR causes endless Light cache phase

• Unhandled exception with a Free Light and VRayLightMtl with Direct Illumination

V-Ray GPU

• Artifacts when using Metalness with Glossy Fresnel

• Artifacts with Adaptive dome when objects are excluded from shadow casting in the light

• Artifacts with VRayALSurfaceMtl and Adaptive lights v2

• Bounding Box artifacts when rendering a VRayVolumeGrid

• Crash with hidden faces on subdivided geometry

• Crash during render with volumetrics

• Crash on stop during Light cache phase

• Crash when cancelling the render for scene with lights include/exclude lists

• Crash when using VRayClipper on an object with material containing VRayCurvature map

• defocusAmount denoise element is not generated with a standard cameras

• Gaussian image filter doesn't match the CPU one

• Hidden edges of VRayEdgesTex is always on with VRayProxy

• Hidden faces are being rendered during Light cache preview, creating wrong lighting

• IPR with multiple GPUs produces CUDA_ERROR_INVALID_HANDLE on stop

• Light cache doesn't work with DOF and perspective camera

• Nested refractive volumes are rendered wrong

• Noisier results with Adaptive lights compared to Light tree

• NVLink GPU allocations only done for Dynamic geometry

• Optimized distance estimation for geometry heavy scenes

• Random crash with tiled bitmaps

• Refractions are rendered darker since V-Ray Next, Update 2

• Unhandled exception when baking texture of a mesh with degenerate UVs

• VRayVolumeGrids are not rendered correctly in VRayNormals render element

V-Ray Cloud/V-Ray Standalone

• Extremely slow light cache for scenes with displacement texmaps

• Matte reflections are not rendered

VRayALSurfaceMtl

• Artifacts around geometries intersections and SSS density scale close to 0

VRayClipper

• Holes in the clipped geometry when rendering with motion blur and the clipping mesh has animated skin modifier

VRayDisplacementMod

• Cracks with 3D Displacement and Keep continuity

• Memory leak with 2D displacement

• Tangent Vector displacement mode clamps the texture's X and Y between 0 and 1 regardless of the Texmap min/max values

VRayGLSL

• Function vr_textureSize returns (0,0) always

VRayHairFarmMod

• Duplicated IDs in VRayCryptomatte element with more than one Hair Generate modifier

VRayHairNextMtl

• Artifacts in raw render elements with Consistent lighting elements

• Diffuse component should go in it's respective render elements

• Shade data is stored in VRayGlobalIllumination when Consistent lighting elements is on

VRayLight

• Different specular reflections when rendering directional disc light with V-Ray Cloud/V-Ray Standalone

VRayOCIO

• Error in V-Ray messages when creating new instance

• No scroll bar in the map color space selector

VRayOrnatrixMod

• Some VRayOrnatrixMod hairs have wrong velocity data with "dynamic tessellation"

VRayOSL

• Broken OSO bytecode export of a shader via MAXScript

• Bucket artifacts with user attributes

• Crash in microfacet("ggx") when roughness is greater than 0.0

• Crash when detach and reattach a sub-texmaps

• Custom shaders cannot access user attributes with V-Ray Cloud/V-Ray Standalone

• OSL string mapper widgets should be displayed as dropdown choices

• Tooltips for combo boxes and extra texture buttons can become too wide

• Tweak's min/max metadata inhibits changing parameter values

• Wrong channel index read from the UV attribute

VRayOverrideMtl

• Vignetting along concave edges with Light cache and many lights

VRayPluginNode

• Crash when rendering with TexSurfaceLuminance

VRayScannedMtl

• Crash when loading a scene while the compact material editor open

• Difference in the VRayBumpNormals render element when rendering with VRayBumpMtl

VRaySwitchMtl

• Crash with undefined sub-material when displacement map is used in another sub-material

VRayToonMtl

• Toon effect missing on non-excluded geometry when the excluded object is hidden

VRayVolumeGrid

• Displacement scale in Isosurface mode is not the same as in Mesh mode

• Empty grids filled with density using the opacity curve render with different density in V-Ray Cloud/V-Ray Standalone

• Mesh mode with a 2D scalar Displacement map renders with artifacts

VRayZDepth

• Refractive objects are white regardless of the Affect channels value with V-Ray GPU

V-Ray Toolbar

• MAXScript error in vrutils.ms when trying to create a physical camera from a camera view without target

.vrscene exporter

• Animated FOV on standard cameras is not exported correctly

• Crash when exporting Forest Pro multiple instances with the same Surface with Boundary checking set to Edge

• Disabled VRayVolumeGrids in Volumetric mode are still exported

• Forest Pro object with VRayDisplacementMod is not exported to .vrscene file

• Negative displacement through textures is not exported properly

• OSL texmaps are flipped with V-Ray Cloud/V-Ray Standalone

• Random velocity data is exported for Forest Pro instances when camera is specified

• Some VRayMDL asset paths are not exported

• Support for animated visibility range of VRayAerialPerspective

• The VRayVolumeGrid's "lightsmultself", "gridreduct" and "mbgrid" parameters are not exported to *.vrscene

• VFB Color Corrections are exported even when disabled

• Wrong UVWs in scenes with OSL

Installer

• VRAY4_FOR_3DSMAXXXXX_PLUGINS environment variable should be modified instead of overridden