Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] General Discussion => Topic started by: jpmartin on 2017-11-10, 03:56:19

Title: Renders slower with distributed rendering
Post by: jpmartin on 2017-11-10, 03:56:19

Ok, here is a head-scratcher.  I was using corona on my main workstation, and I love it.  So, I decided to purchase an additional computer to start to build a farm so I can work from home.  I bought an older hpz600 with dual xeon 5670 processors (12 total cores at 2.93 ghz each).  I was excited to see how much of an improvement it made.  I did a render on just my computer (i7 6-cores a 3.3ghz) and got a render time of 16 minutes.  So I tried it with DBR enabled and got a render time of 17 minutes total.  I cant understand it.  Can anyone make sense of that for me?  I was using 7% as a noise threshold for the render tests.  I am trying again now with a set number of passes, so maybe that will make a difference.

i7 5820k @ 3.3ghz, 16gb ram = faster than i7 5820k @ 3.3ghz + dual xeon 5670 @ 2.93, 32 gb ram??

Title: Re: Renders slower with distributed rendering
Post by: jpmartin on 2017-11-10, 04:21:28

Ok, here's an update.  After setting the scene to render for 14 passes instead of setting the noise limit to 7%, I have a huge difference between the two computers.

My computer alone rendered in 21:19, and the computer + the render node rendered in 10:49.

So now the question is, why such a huge difference between telling it to use a noise limit vs a set # of passes?

Title: Re: Renders slower with distributed rendering
Post by: maru on 2017-11-10, 10:30:01

Hi, we have another report like this, so it looks like something may be wrong with DR and noise limit.
Can you tell me what is the number of passes rendered when rendering on 1 workstation only, and when rendering on workstation+node? The number of passes is printed in the vfb stats panel, and for DR it will be X passes (Y DR).

Note to self: support ticket 8565

Title: Re: Renders slower with distributed rendering
Post by: maru on 2017-11-28, 17:50:30

We have just released Corona Renderer 1.7 Hotfix 1: https://corona-renderer.com/download/
It contains some important DR fixes, so please download and install it.
Please make sure that Corona Renderer 1.7 Hotfix 1 is installed on all computers, and that DR server 1.7 Hotfix 1 is running on all of the slaves.

If the issue will remain after installing this version, please contact us, and we will continue looking for a solution.