Render settings

[kmlkarablt]

Hi Guys,

I'm rendering a 4500x3500px scene and l need your advices for time saving. If i render in ultra high settings render takes 17 hours time. Is there a trick to reduce time and keep almost same quality? Thanks in advance

[Micha]

If you need speed, than nothing can beat IM+LC. Did you use it? If yes, try an IM max rate 2 for under sampling. You lost small details, but GI AO could help to bring them back. Is the image needed for 300 dpi? If yes, use a higher noise threshold. If you use VfR3 than let the denoiser do some work. What's you machine and what kind of scene is it? Also, best post a screenshot of your settings.

[kmlkarablt]

If you need speed, than nothing can beat IM+LC. Did you use it? If yes, try an IM max rate 2 for under sampling. You lost small details, but GI AO could help to bring them back. Is the image needed for 300 dpi? If yes, use a higher noise threshold. If you use VfR3 than let the denoiser do some work. What's you machine and what kind of scene is it? Also, best post a screenshot of your settings.

First of all i really thank you for your quick answer. Actually i was using 5SRW method's settings (Ciro Sannino's online course method) but now i switched VfR3 like you said and i was using ready made settings like medium, high or ultra high because 5SRW's settings takes too much time. I'm using IM+LC. Noise threshold is 0,005 and denoiser also. IM min rate -3, max rate is 0. With vray's medium settings my scene render takes time 7m, with high settings it takes 29 minutes. My machine settings are : intel core i7 5840k, 32 gb DDR4 rams, Nvidia GeForce GTX 970 Graphic card. By the way i rendered in high quality settings with the attached image but i changed IM min rate like -4, -2 and i took time 54 minutes. Thanks in advance for advices.

[Micha]

Great to hear you got your render times in the right direction.

At VfR2 I use a noisethreshold of 0.015 all days +/-0.005. I'm not sure VfR3 needs other values. But if I remember me right on my test some years before than a halfen noise threshold cause approx. a doubled render time. Which color values are you using for the white wall material?

What is your global max reflection/refraction depth?

[Iain]

Actually i was using 5SRW method's settings (Ciro Sannino's online course method)

Sorry to hijack your thread but I'd really like to know what are your thoughts on Ciro's training? I've been tempted several times to give it a try but have been hesitant as it seems aimed more at 3D Studio and architectural visualisation - I use VfR and am more interested in product rendering. I appreciate that V-Ray is V-Ray, and skills from one field may be transferable, but it would be good to get some feedback from a user. Thanks.

I like your rendering by-the-way, very nice.

[kmlkarablt]

Great to hear you got your render times in the right direction.

At VfR2 I use a noisethreshold of 0.015 all days +/-0.005. I'm not sure VfR3 needs other values. But if I remember me right on my test some years before than a halfen noise threshold cause approx. a doubled render time. Which color values are you using for the white wall material?

What is your global max reflection/refraction depth?

Hi Micha, sorry to write you late because of that i was working hard. Walls are white (255,255,255), Reflection and Refraction max depths are 5.

[kmlkarablt]

Sorry to hijack your thread but I'd really like to know what are your thoughts on Ciro's training? I've been tempted several times to give it a try but have been hesitant as it seems aimed more at 3D Studio and architectural visualisation - I use VfR and am more interested in product rendering. I appreciate that V-Ray is V-Ray, and skills from one field may be transferable, but it would be good to get some feedback from a user. Thanks.

I like your rendering by-the-way, very nice.

Hi Iain,

Ciro's training is good for beginners but there is not a product visualization tutorial inside. I've watched all course videos and adapted things to VfR because videos are created for Vray for Max.
By the way they give you Vray for rhino scenes after you buy the course. You can also check rhino scenes and compare it with videos and learn a lot of things.
But that was a really hard process because the things showed in videos are for Vray for Max and when i asked in private group of 5SRW ''-How can i do that?'' the answer almost was ''-You can't because there is not an option like that in VfRhino''. Maybe it can be changed now because l was training in VfR 2.0 (there wasn't VfR 3 in that time).
Anyway, l've watched a lot of tutorials and tried the create scenes like i've seen in behance or pinterest and i've learnt like this.
In my opinion it's important to start with a tutorial like Ciro's because Ciro has a good system and it's working. After you understand basics, you can change the options or you can add more abilities from others but if you start to learn from youtube (from different people's different systems) it would be confusing to understand main concept.
After i complated 5SRW l bought Grant Warwick's Mastering Lighting course but l couldn't complate his tutorial because of works. Grant also has a tutorial series like ''Mastering V-ray'' and he goes deep inside of settings but it is really hard for beginners.
By the way I am an industrial designer and i learned product visualization from other tutorials on net. I found lighting guides and studio setups from pinteres. Tried them all and got results. This is also a good way to understand but like i said you can start with 5SRW. Don't hesitate. In a month you will be in a good level. I hope i can explain me. Don't hesitate to ask me something. I explain.

[Micha]

Hi Micha, sorry to write you late because of that i was working hard. Walls are white (255,255,255), Reflection and Refraction max depths are 5.

OK, from my experience you run in one of the VfR3 problems - the missing GI multiplier force the user to edit all color/textures to 80% values. Without this you get less natural contrast and longer render times. I hope we will get this option back in the future.
https://forums.chaosgroup.com/forum/...che-multiplier
In your case I would set the main "whites" to 210 and increase the exposure a little bit to keep the image brightness.

The max refl/refr depth can strong influence the render time. I'm very careful use this option, most I try to stay on depth 1 or 2. Maybe your large glass walls needs 2..3. Is there a light frost effect?

I'm curious how this two tweaks would change look and render time.

(For a more natural lighting I would use a sky environment or HDRI. But maybe you need the neutral winter look. )

[Iain]

Thanks very much, kmlkarabit, for taking the time to give me such a comprehensive reply regarding Ciro's training. I really appreciate it. It sounds as if I would find it useful so I think I will take the plunge and sign up - I might wait until he has another discount offer though! I have heard of Grant Warwick's training but haven't looked it up - I shall do so now.

I too am an industrial designer and tend to do product visualisation rather than architectural, although architectural is something I find interesting (and inspiring) so learning through that route is no bad thing. Thanks again for taking the time to reply, and for the offer of help.

[kmlkarablt]

OK, from my experience you run in one of the VfR3 problems - the missing GI multiplier force the user to edit all color/textures to 80% values. Without this you get less natural contrast and longer render times. I hope we will get this option back in the future.
https://forums.chaosgroup.com/forum/...che-multiplier
In your case I would set the main "whites" to 210 and increase the exposure a little bit to keep the image brightness.

The max refl/refr depth can strong influence the render time. I'm very careful use this option, most I try to stay on depth 1 or 2. Maybe your large glass walls needs 2..3. Is there a light frost effect?

I'm curious how this two tweaks would change look and render time.

(For a more natural lighting I would use a sky environment or HDRI. But maybe you need the neutral winter look. )

Hi Micha,

Thanks for explanation and teach me tricks about render and material settings.

I'll try whites like 210 and change depths to 1 or 2. By the way there is not a frosted glass.

I use this light settings because my costumer wants it like this. Full of white walls and minimum reflection

I'll send result mate. Thanks again

[frip51]

You should always reduce the brightness of any colour slightly, staying below 240 is never a bad idea. Most professionals will tell you that sooner or later (also Ciro, by the way), and there's a reason for it:
Reality does not offer pure white (or black), and what you're basically trying to achieve is a comprehensive simulation of reality.

You don't want to burn the image with too bright of colours, because you lose information in these areas. Rather seek cure in post processing by fine-tuning Contrast/Brightness.

Good luck and looking fwd to seeing the results!
Matthias