V-Ray and Corona

[glorybound]

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).

[Pixelcon]

It's not faster from my experience.

[LudvikKoutny]

There are some cases where Corona is a bit faster, but it's generally not interior scenes. At the same time, there are equally many cases where V-Ray is faster. From my V-Ray Next experiments, I think that the currently even scale will tip in favor of V-Ray when the final version of Next is released. So if the rendering speed is what you are after, then waiting for Next version of V-Ray makes more sense than jumping to Corona. Corona is mostly faster when it comes to workflow, not rendertime.

[Pixelcon]

Corona is mostly faster when it comes to workflow, not rendertime.

My thoughts exactly

[DPS]

Is Next useable in production? I?ve not tried it yet but I did try Corona today.

[piotrus3333]

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.

[rivoli]

Corona is mostly faster when it comes to workflow, not rendertime.

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.

[PIXELBOX_SRO]

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.

[danio]

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!

[DPS]

How did you find it?

I like it but haven't formed a conclusion yet.

[LudvikKoutny]

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.

You can achieve nearly identical results with CoronaMTL and VrayMTL. First of all, the Color swatch and percentage are in V-Ray too, the only thing that's on top of that in Corona is Level multiplier for the material components. If you want to get 1:1 results to V-Ray, simply set all the Level values to 1.0 and completely ignore them. The rest of the material will then work exactly same as V-Ray. I don't know why would you assume that the level value needs to be touched/adjusted?

[LudvikKoutny]

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.

Sub-1 IOR works, just not in the UI. Simply plug a CoronaColor or any other map, which outputs constant value, and set the output multiplier of CoronaColor map to any 0 to 1 number and it will work.

[piotrus3333]

Sub-1 IOR works, just not in the UI. Simply plug a CoronaColor or any other map, which outputs constant value, and set the output multiplier of CoronaColor map to any 0 to 1 number and it will work.

sure, color input works but engine treats IOR<1 as 1/IOR

[LudvikKoutny]

sure, color input works but engine treats IOR<1 as 1/IOR

Isn't that the way it should work? I assumed that's how it works in V-Ray too. For Fresnel IOR reflection, it makes Corona compatible with PBR metalness textures, and for Refraction IOR, it makes it possible to create things like underwater scenes, where it's assumed that the camera is already inside of water and looking at the water level from below.

[piotrus3333]

Isn't that the way it should work? I assumed that's how it works in V-Ray too

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.