Volumetric FX - Known bugs and limitations


Currently Corona Renderer does not support features of various volumetric simulation plugins in one hundred percent. This is mainly due to the fact that those plugins have been developed with other renderers in mind, where, unlike in Corona, it is common to follow non-physical workflows. Another reason is that these plugins support various advanced VFX features, which are currently out of scope for Corona Renderer.



This article contains a list of known issues related to Corona Renderer and volumetric simulation plugins, and suggested solutions and workarounds. This includes: 


V-Ray


The installed version of V-Ray is not fully supported. The minimum required version to render VRayVolumeGrid is V-Ray X.


Interactive rendering does not fully support VRayVolumeGrid for the currently installed version of V-Ray. The minimum required version is V-Ray X.




Phoenix FD


PhoenixFD/VRayVolumeGrid in Isosurface rendering mode is currently not supported.


Phoenix FD Foam rendering is not supported.


The installed version of PhoenixFD is not fully supported. The minimum supported version of PhoenixFD is X.


Interactive rendering does not fully support the currently installed version of PhoenixFD. The minimum required version is PhoenixFD X.




Fume FX


Corona Renderer currently ignores illumination map settings of FumeFX nodes.


Corona Renderer currently ignores motion blur settings of FumeFx nodes.

 

Corona currently does not support FumeFX with Space Warps.


Corona Renderer currently only supports rendering of FumeFx nodes using the Standard shader.


The installed version of FumeFX is not fully supported. The minimum supported version of FumeFX is X.


 


Additional issues

Volumetric effects may not render as expected (may disappear completely, produce artifacts, or cause excessive noise or other unwanted issues) if:

  • The camera is placed inside the medium (e.g. inside a Phoenix FD object, or inside a mesh with CoronaVolumeMtl applied)

  • A light or object with CoronaLightMtl is placed inside the medium

  • Two volumetric objects are intersecting with each other, for example:
    • One volumetric object is inside another one
    • One volumetric object overlaps with another one partly
    • A volumetric object is placed within the global fog

We are planning to fix all of the above issues in the future. 

 


For a list of other known bugs and limitations in Corona Renderer, see this article.