Render showing squares on surfaces

[emma_main]

Hi,

Just a heads up, I am quite new to V-Ray and usually just play around with the render options until I get a result that I am happy with.

In my current project however builds the light cache and everything is looking great but then when the rendering begins, the surfaces show up with squares on them?

I have attached a screenshot of the scene and render settings, I have no idea where I'm going wrong and any help would be greatly appreciated!

Thank you!!

[nikoleta.garkova]

Hi emma_main,

Your GI Primary Rays (right handside of the Asset Editor) are set to Light Cache - while this technique will approximate the global illumination in your scene, it is best used as a Secondary Rays option in combination with Brute Force as Primary Rays. To read more and have some further examples when using Light Cache, please visit - https://docs.chaosgroup.com/display/...Cache+Settings

Keep in mind that it is generally better to stick with the Default render settings, and just tweak the Quality slider to get better results of your renders. Moreover, it is useful to know that you can always use the 'Revert to Default Render Settings' option (see attached screenshot) in the Asset Editor whenever things don't render as expected - just for the sake of troubleshooting, you can compare the render results after switching back to default settings.

We've also prepared a great article about Render Settings here - https://docs.chaosgroup.com/display/...s.+Render+Time, which you might find interesting. Hope this will be of help!

[Muhammed_Hamed]

I agree with Nikoleta, defaults will work for most cases. Best is to stick to default settings whenever you can

Vray's workflow has been about ease of use in the recent years, getting a clean render is very easy using just the noise threshold slider, it is all what you need really
Vray is very smart, it will figure out the right amount of samples on different parts automatically, this scene adaptivity and smart sampling in Vray is very effective, leaving the user focus on the art side of things(shading and lighting)
What I do is setting Max subdivs to 50 for example, then use noise threshold to control quality(noise) vs render time. The default of .01 is great and was picked carefully to be the default value, you can use a high noise threshold like .02 for faster renders(then use Vray's denoiser with it) and on the other hand a lower noise threshold means a cleaner image and more render time, 0.005 is lowest I have ever used personally.
This is how I used Vray since 2016-2017 when the devs implemented this lovely, user-friendly sampling workflow.
And about Global illumination, use 2000-3000 LC subdivs for Interior scenes, nothing else you need to change

You don't need to change bucket size, having it very low will affect CPU utilization and make the rendering slower. Again all of these default values are picked carefully by devs/expert users and will work for 99% of cases

Best,

Muhammed