It is in the TODO list but no one is working on this topic at the moment. My plan is to have spectral rendering support available only for CPU in order to reduce the complexity of the job
Is there any visuals quality defference between RGB and Spectral to go slower ? After a looking at maxwell gallery i really think Corona RGB renderer do better quality work.
I know it is a bit off topic but do someone know what nasty trick is behind this defference between corona glass and other renderer ? look yourself it's like light is scattering hundreds of time before get out :
And when people ask why there are so much difference between to path tracing based algo look what happen here


https://corona-renderer.com/forum/index.php?topic=1975.0
Glass are so bright in this renderer that you can't believe it
https://i.pinimg.com/originals/1b/92/0a/1b920a3484a79acf1c582bf856b42706.jpg