---
title: "2.1"
canonical: "https://documentation.chaos.com/space/PHX4MAYA/125699343/2.1"
format: markdown
---
*Official release*


## **New Features**

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- The emissive lights must produce specular lighting
- Smoothing option for the input cache that can be used to remove grid artifacts
- Lifespan option for the simple particles
- Mesher
- Simple method needed for creating a standing volume
- Foam shader - render time particle reduction
- Simulation without cache files
- Render channel for volumetric normals
- Render channel for z-depth
- Direct support for vrmesh and alembic files


## **Modified Features**

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- Simplify the UI
- Improved motion blur using the UVW coordinates
- Ability to load frames from the base simulation in resimulation mode
- Support for direct rendering of particles with VRay
- Light cache option for the foam shader in fog mode
- Curve and Gradient point reduction
- Remove Preview Color slider
- Geometry mode for the foam shader
- Resimulation must automatically change the transparency graph in order to match the base simulation


## **Bug Fixes**

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- Phoenix render elements are 2 times brighter then they should be
- Support for subdivision and NURBS surfaces
- Incorrect rendering with emissive lights and Irradiance Map
- The cache path is not updated properly after changing the workspace
- Foam shader ignores the **invert gizmo** option
- Intermediate objects must be always ignored, even if they are selected
- **Per vertex** Object velocity is not affecting normal geometry (only sources)
- Emission lights do not work with texture source for emission
- Slow viewport preview even with all channels disabled
- The cache path must be exported always with Unix type slashes
- Sometimes during the simulation the viewport shows wrong/empty frame
- Newly created cells with adaptive grid with jammed wall, are not frozen
- Incorrect force with **Wind from movement** in the first frame if the simulation was not started from there
- Wrong size information in the **Manual adaptation limits** rollout
- Phoenix is not working with VRayDistanceTex
- The grid size information is not updated properly when using Viewport 2.0
- Wrong position of the particles when resimulating with increased grid resolution
- Occasional jittering with wavelet turbulence and adaptive grid
- Simulator does not render with motion blur, velocity channel, **play speed** set to 0 and **wind from movement** option turned on
- Dead lock at the last frame with the new synchronization when time scale is 0
- Support for VRayVertexColors texture
- Grid adaptation must not depend on the max advection step
- Crash/Incorrect result with quad face sets as sources
- Wrong rendering with V-Ray 3.0, geometry mode and other geometry inside the simulator
- **Disable Liquid Shadows** option can prevent also self-shadowing
- Particle sources are processed even when they are ignored from **Scene Interaction**
- Foam shader caustics do not work if GI visibility is off
- Generate/Receive Caustics options are swapped in the foam shader
- Incorrect simulator wrapping when using as non-solid source
- Random freezing during resimulation