I am curious if V-Ray has learned anything yet from Corona and if anything made it into the next V-Ray? I am working on some interiors with long render times and I am always tempted to jump into Corona since the rumor on the street it is much faster for interiors (although it never seems to be the case when I try it).
It’s not faster from my experience.
My thoughts exactly
Is Next useable in production? I?ve not tried it yet but I did try Corona today.
I did exactly that recently. I played a bit with beta few years back but did not touch it since.
How did you find it?
I was curious about corona?s refractive shaders, dispersion etc and very quickly hit the wall of limited freedom in abandonning real world physics (needed IOR<1, abbe<10). I know it is the whole point of this engine but for me quite a deal breaker.
don’t mean to argue this point, as personal experiences may vary quite a bit, but for a while now I haven’t bothered touching any setting with vray either. default settings and progressive, since version 3 came out, are perfectly adequate in almost any situation. workflow wise I don’t find corona being more intuitive or faster. it might have been the case once, but I don’t think it’s still as valid a point as it used to be.
Whenever i have to work in Corona, for example to be able to setup the same material in Vray, i find it BIG HEADACHE to work with the LEVEL multiplie, the COLOR swatch and the TEXTURE percentage…feels like its activating something ugly in my brain. And i never managed to get the same result when trying to replicate complicated setups in Corona material. Thus, for me, working with Vray materials is a lot smoother and by far quicker.
I woudl be quite interested what this marriage brought apart from Chaos now owning 2 best rendering engines 
Its clearly not the domelight…as Vlado said, they went their own way in the end.
I am not too keen on the way Vray is handling bump maps. Corona does this a lot better and so does Arnold. Its something that happens on the edge of directly lit surface and surface in shadow…the way the shadow transfers.
I am really looking forward to the day when i can use Corona materials in my scenes without having to reset everything but that seems to be very far by looking at the Betas.
I enjoy both engines, but for me the biggest draws to Corona are the lightmix interface and setup, the material preview and the material library…super handy when youre in a rush and quickly need rubber or something I dont have in my custom library. But being able to tweak lights right in the VFB is so great, and being able to bake those settings into the scene is even slicker.
The biggest draws to VRay are things like the clipper, non physical fakes, the new optix denoiser (love!) and better ram usage.
I am working on two projects right now and using Vray for one and Corona for the other…it is nice to have the option!
I like it but haven’t formed a conclusion yet.
sure, color input works but engine treats IOR<1 as 1/IOR
nothing wrong with 1 being the limit for Corona. no refracting material on this planet actually speeds up light passing through (IOR<1) but if for some reason you need purple part of light bend ?left? and cyan part bend ?right? on a single poligon refractive plane than you going to have more luck with VRay.
than you for the abbe trick.
VRay handles IOR<1 differently to Corona.
refraction
since corona can render vray material, can we install vray(demo/without license), and use vrayMlt for material but render with corona?
I haven’t looked at Next yet, but wasn’t the intention that Vray 4.0 would have material preview and some form of light mixer in a new VFB as well? Were those plans postponed?
I don’t see anything different with the VFB post controls.
Maybe I’m mixing it up with PDPlayer or something but there was a video of a new framebuffer a while ago. Oh well, but what about the material preview?
From what i heared at least the light mixer and the vfb compositing will come to vray. but they might be added a little later in a servicepack. I dont know about the material preview.