URGENT!!!!! Rendering Black Buckets

[fpedrogo]

Re: URGENT!!!!! Rendering Black Buckets

Hi
I changed some parameters to speed up a little bit your render. Also I use "store irrad map" for the lights, to be able to use the Irr to calculate the light solution. Here is the file that we change. I hope this work for you.
I'm wondering why you don't use IES lights instead of rectangular light.

http://www.mediafire.com/?1fk86f3rv3o7bar

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[aclark]

Re: URGENT!!!!! Rendering Black Buckets

WOW! Thanks sooooo much. I was in a time crunch and I have not used the IES lights before. Thanks for looking at my settings, hopefully I will be able to crank through this a bit faster now. Do IES lights help with calculation time?

[aclark]

Re: URGENT!!!!! Rendering Black Buckets

Also, as I am sure you are a busy man, but what were the real dealbreakers with my settings that you noticed. I saw that you changed the light chache subs from 1200 to 1000 as well as the render region from 64x64 to 48x48. I think you also changed my noise threshold as well? I have never quite understood the render region aspect and why you would have one number versus another?.....

[fpedrogo]

Re: URGENT!!!!! Rendering Black Buckets

Also, as I am sure you are a busy man, but what were the real dealbreakers with my settings that you noticed. I saw that you changed the light chache subs from 1200 to 1000 as well as the render region from 64x64 to 48x48. I think you also changed my noise threshold as well? I have never quite understood the render region aspect and why you would have one number versus another?.....

I change some setting to have a good balance between speed and quality. The light Cache wasn't to important, you could use 1200 or 1000, I use 1000 to speed up the render in my machine, that is only dual core, but you are going to have more quality with 1200. In term of the threshold, this is very important, this value control the anti-aliasing noise. If you use .005 or .001 you are westing time, because with .008 you get almost the same quality with lest render time. This setting is one of the most important to reduce the render time. For final production render I always use .008. Also on the Min and Max subdivs I use min 2 max 6 when I have very small detail and Min 1 Max 8 for the other render. These value determine the minimum and maximum number of pixel that V-Ray through to calculate the anti-aliasing, these value are the square of that number. If you use 8, V-Ray could thought up to 64 samples per pixel, So this is enough for any render. More than that you are westing time.

The region bucket is not very important, but you have to keep in mind that if the bucket is too large, it have to calculate too much information per core and can produce error or increase the render time. Also it's not good that the size of the bucket is very small. In your case I changed the bucket to 48, because I use to use that size, which is the default size, but I don't think that 64 affect the render.


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[aclark]

Re: URGENT!!!!! Rendering Black Buckets

Thanks a lot, that really helps!

[fpedrogo]

Re: URGENT!!!!! Rendering Black Buckets

Thanks a lot, that really helps!

My pleasure.

[artupato]

Re: URGENT!!!!! Rendering Black Buckets

Thanks a lot, that really helps!

My pleasure.

sir fernando,
"store with ir map" will lessen the render time?
what is the concept behind this option upon rendering a scene?

About the threshold, yes we have to be very careful when tweaking the options. When I tried using 1.48.94 with 3000 subdivs on LC,
it caused the render to crash. What about for IR? -
3,-2 for 800x600
Hsph subdivs 100 and samples 30 - are these good render settings?

[fpedrogo]

Re: URGENT!!!!! Rendering Black Buckets

store with ir map" will lessen the render time?
what is the concept behind this option upon rendering a scene?

When you enable this option V-Ray store the calculation of the light in the Irr Map. Your are going to notice that the Irr Map calculation will be a little bit slower, but the render time is going to be less. Also you are going to have less noise on the lights, because you are using Irr Map fo the lights. The other benefit is that you can save the Irr Map with the lights and reuse it later.

it caused the render to crash. What about for IR? -
3,-2 for 800x600

Irr Map have a direct relationship with the dimension (pixel) of the render. The easy way to explain the Min Rate and the Max Rate is that the Min Rate throw samples on the large areas (flat wall, floor, areas without much variation in color and details), the Max Rate throw sample on the detail areas (corners, contact shadow, trims, etc.). If you increase the size (output) of your render you should decrease the Irr Map solution. I usually use Min Rate -4 and Max Rate -1 for my final production render (more or less 2000 x 2000).

Hsph subdivs 100 and samples 30 - are these good render settings?

Hsph Subdivs control the quality of the samples and reduce the splotchiness. 100 is kind of high I use between 50 - 80, if you still having splotchiness with 80, maybe you have to throw more sample ( using the Min Rate) instead of adding more quality to the samples (Hsph Subivs). The Samples control the blending of the smoother of the samples. you have to be careful with this option, because if you use a high value you can smooth some shadows (specially the contact shadow and corner) and give the illusion that the object are floating in the air or you can get flat corner. I usually use between 20 - 40.


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[artupato]

Re: URGENT!!!!! Rendering Black Buckets

Wow thank you for the reply fernando. you've been a great help always. even your videos. Those vids broadened my knowledge on vray for a year now. Technicalities area important for me, thanks for the explanation Keep it up guys! ;D

go ASGVIS!

[fpedrogo]

Re: URGENT!!!!! Rendering Black Buckets

ow thank you for the reply fernando. you've been a great help always. even your videos. Those vids broadened my knowledge on vray for a year now. Technicalities area important for me, thanks for the explanation Keep it up guys!

go ASGVIS!

My pleasure!

Best