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Hi,
I have installed Octane a few days ago on a single nVidia GeForce GTX 780. But to obtain reasonable rendering speed, I want to add another nVidia Geforce, but this time a new GTX 970. Is it possible to install both cards on the same computer? If so, do you need SLI or extra wires? Thanks.
HI :)
There's documentation on the OTOY site,. under support / faq's / octane renderer
https://docs.otoy.com/#rOctaneRender Universe
you can select carrara from the list of options.
Hope it helps :)
HI Argus :)
I just had a quick look at both, and it looks like the 970 has less cuda cores than the 780,... BUT,...
There's options in the settings panel to set up "out of core" for textures which save you loading those into the graphics ram. so you may not need to get the 970
I'm not sure if both cards can be different , I seem to remember that the had to be the same , but that may have changed,.
As long as you have room, and they both use the same driver,.. maybe ?
See the Otoy site forums for info on multiple cards,. :)
it can be handy if a small scene that fits on the smaller card, you can speed it up a bit with more cuda cores
otherwise not much difference in fact do not use lesser card
on mine, adds 3 but then scene has to be under 2GB, is faster if it is I tick if small scene to get it done quicker
If anyone happens to know.
just out of curiosity, I know it renders Hair, does it render plants?
another is size, I am doing a scene that is 13.5 x 9 @ 300 dpi for print. Makes that quiet large, since this renders in the video card does it keep the wholeimage in there or render in sections and pass back to the CPU which would mean it could do something so large.
not fond of carrara trees, will do them if not full detail mesh miss branches, bogs it down a lot
Good to know you are finding the Basic and Advanced training useful. I have thought about doing a set on Octane for Carrara as I use it all the time myself. Not sure of numbers and I wanted to ensure that it had gone beyond the beta stage. I am currently doing a set on animation, but my pc crashed last week and it is looking like I will need a new one, which is delaying me making progress on anything at the moment!
An image of that size has 10,935,000 pixels and so will take up around 32 MB (3 bytes per pixel, one each for red, green and blue). So it would only take up 1.6% of a 2GB card - I think it us keot on the card, but as you can see, it is easily accommodated.
Yes OR4C renders plants and trees, just be careful if replicating them. Trees already have a level of instancing in them for the leaves, so replicating them multiplies the number of instances and Octane does not currently handle nested replicators in the same way that Carrara handles them and so can produce huge scene files that can crash Octane. There is an option to "flatten" trees which can be useful when using replicators, depending on the balance between how many trees you are replicating and how complex your tree is - keeping the tree simple helps. Don't let it put you off, I have produced nice looking forests that render on my 2GB card.
Sympathies on the PC crash Phil - I had that happen over Christmas. Set me back a good 3 weeks between diagnosing & repairing (no data lost, fortunately - always make sure your backups are up to date!) Gonna be a very lean February as a result, but what the hey, who needs food eh? ;)
Even though it's repaired, I'm still gonna budget for a new one, cos like an old car with a suspicious rattle, I find I no longer trust it!
Well, I have already bought the nVidia GTX 970, so I ll just have to install it and live with it. I also have to figure out the out of cores widow. And yes, they say on the OTOY site that you can have different nVidia cadrs. Thanks for your answers, 3dage and fool.
If I remember correctly, the key thing about using multiple cards is that it is best to have the same graphics memory on each, as if you say mix a 2GB card with a 4GB card, it will only use the first 2GB of the larger card. Of course I may have this wrong...
Hi 3DAGE, Thanks for the link I will check it out. :c)
@PhilW - Sorry to hear anout your crash Phil ........ not fun at all!!!
Welcome aboard! Feel free to ask questions and for help here, this is a pretty frienly lot!
Hi PhilW, Sorry to hear about your computer and look forward to seeing some of those Octane Renders. Is there a forun/page dedicated to Carrara users animation?
Thank you in advance.
I have the similar setup with 2GB on 760 and 4GB on a 970. With scenes smaller than 2 GB, it runs like what ever.
But in the moment im running a 3500 px * 7000 px image that needs about 30000 s/px. That will take about 1 1/2 days or so...
It takes about 1.3 GB and the gpu cores are working with 81°C/87°C.
Hi DustRider, Thanks for the invation and will be doing so, thanks again to all for your assistance.
For a specific place for Carrara Animators, you should take a look at the Carrarators site:
http://bond3d.wix.com/carrarators
HI Eddy :)
Just a quick question about your render,.
I'm curious,. why so many samples,. ?
If I'm working on an image,.I can normally get something good within a few hundred samples 200 -500, but i'll sometimes let it go to a couple of thousand for better quality
Normally,. If I see "issues" with the image,. then it's either a shader issue, or a lighting issue.and i'll stop and fix those.
Although many carrara shaders work well with octane,. there are some instances where it's best to create octane shaders,.
If fact,.. to be honest,. we should only be using octane physically based shaders,..if your rendering with octane,.. to take advantage of the physical based renderer.
the same applies to Luxrender,. or Iray, or whatever else.
Also,. are you using Pathtracing or PMC
It would be nice if there was some video tutorials for the Carrara Octane plugin on the OTOY site. While there is some for all the other plugins, there is none for Carrara.
HI Argus :)
The development of OR4C came late to the party,. for example,.. 3D-max had a plugin available fo the release of Octane Renderer version 1.
OR4C was in beta development when Octane renderer 2 was released,. and as far as I understand the current beta (Release Candidate) is ver 82,. while sighman continues to work on the plugin integration and improvements for both Octane 2 and Octane 3, ...the last couple of updates have added support for Carrara lights and has integrated some of the "settings" options into Cararra's UI with new panels,. EG: the Octane "render target" options are now accessed through the SCENE / EFFECTS tab.
Previously these were part of the main "settings" options,.. in the viewport toolbar.
so,. it's best to wait until the "final" version is released, before creating tutorial vids,.
BUT,.. In saying all that,... there are people here who have been using Octane ver1 ( stand alone) to export from carrara and render in octane,. and have been using Octane (1 and 2) and the OR4C plugin,. and can help answer questions.
it's also worth noting that although these are different plugins for different 3D applications,. they all have a common set of features and functions because they all use Octane renderer,.
Hi 3dage, I just installed my new nVidia GTX 970 and, although it has less CUDA cores, it registers way above my older nVidia GTX 780 card. I just don't understand.
HI Argus :)
It would seem that the 9 series is two levels up from the 7 series,. so although it has less cuda cores,. they're running in a different way (compute model)
interesting ....
My bad :(
GeForce 600/700/800 series is the Kepler architecture from 2012.
GeForce 900 series is the newer and more efficient Maxwell architecture from 2014.
Especially Compute performance got a huge boost with the Maxwell, here is a benchmark comparison of 780 vs 970:
http://www.anandtech.com/bench/product/1493?vs=1595
LuxMark (similar to Octane) is over 200% faster.
I undesratnd that the nVidia GTX 970 may be more efficient, as it is more recent, but it has only 4 GB of memory. My older GTX 780 has 6 GB of memory. Which is the lesser card in the end?
The more efficient the card (and the more cores) then the faster it will render. The more memory on the card, the larger the scene can be rendered without needing Out of Core memory. But if a scene fits into the 4GB, then the faster card will be preferable.
So, I had a major computer crash about a month ago which rendered it beyond repair - thank goodness for LiveDrive which had backed up most of my data for just such an eventuality! I now have a new machine with a more recent graphics card, and it renders using Octane at least 5 times faster than my previous machine, so that is great! But one of the few things that I lost was the work that I had done making new Octane skin shaders, so I have had to recreate them and this is where I am at now - this is one of my test renders which shows the SSS quite well I think. I hope you like it - more completed images will be coming soon!
Thanks for everyone's support.
Phil
Phil, is this Octane 2 or Octane 3? From my experience there is a bug with version 3 that specular volumes dont render the same as they do in version 2. One can really only tell the difference when they compare renders from both version side by side.
It is Octane 2. I have tried using the new test version of Sighman's plugin for Octane 3 and and when I then launch Carrara, I get a message that "OctanePlugin.mcx failed to load". If I then try to load a scene or create a new scene, I just get "An error has occurred". So I had to uninstall and am using the latest Octane 2 version for now, until I get a response from Sighman.
Hi Phiil :)
I'm using both 2 and 3 plugins on different carrara's,.no problems running
Yes, I don't know what the issue is, I'm the only one who I have heard of having this issue and it worked fine for me on my previous machine. Same issue appears on both versions of Carrara that I think you are using. I'll have to wait for Sighman to come back to me on it. At the moment, I'm just pleased to be able to render anything again!