Volumetric FX - Known bugs and limitations
Currently, Corona 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.
This article contains a list of known issues related to Corona and volumetric simulation plugins, and suggested solutions and workarounds. This includes:
V-Ray
Phoenix FD
PhoenixFD/VRayVolumeGrid in Isosurface rendering mode is currently not supported.
Phoenix FD Foam rendering is not supported in Corona 5 and older.
Fume FX
Corona currently ignores illumination map settings of FumeFX nodes.
Corona currently ignores motion blur settings of FumeFx nodes.
Corona currently does not support FumeFX with Space Warps.
Corona currently only supports rendering of FumeFX nodes using the Standard shader.
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*
*Fixed in Corona 4
We are planning to fix all of the above issues in the future.
For a list of other known bugs and limitations in Corona, see this article.