Comments for jeffpatton.net http://jeffpatton.net 3ds Max Illustrator specializing in CG lighting, materials, and rendering Thu, 17 May 2012 04:31:00 +0000 hourly 1 http://wordpress.org/?v=3.3.2 Comment on GTX/Quadro/Tesla – my opinion on today’s GPU selections for rendering by Charles http://jeffpatton.net/2010/11/gtxquadrotesla-my-opinion-on-todays-gpu-selections-for-rendering/#comment-7517 Charles Thu, 17 May 2012 04:31:00 +0000 http://jeffpatton.net/?p=202#comment-7517 Thanks a lot for your response Jeff. Based on that I think I can do some math and figure out the actual performance of Tesla. I should post it back here later once I do it. That's pretty crazy that the files you get are that big. I specifically tell my vendors when they do conversion from CAD to Maya/Max to keep them within 5-6 million polys as there is really no reason for them to be bigger even for high res print output. The print res shots I do end up being around 8K to 13K tops, but that's a size of an actual composed image from my photoshoots, the car within the frame could be 3K or 4K render as I tend to leave nice amount of room around the car, usually don't do tight crops, especially for web where the images will be used in many places at difference aspect ratios. And it the past I did 4K car output with scanned data converted into Maya and Max that was only 2 million polys and that held up really well for advertising shots. Good to know that 6mill poly model will fit within the 3GB or so. I was going to test the GPU with GTX 670 4GB or GTX 680 4GB version and then see how to proceed from there. And if one day I need Tesla I can always get that. I also haven't been experiencing any crashes with Max and Vray, very rarely. But I can really push it hard for days without crashing so I wonder if there is something in your hardware configuration that causes that. Thanks a lot for your response! Charles Thanks a lot for your response Jeff. Based on that I think I can do some math and figure out the actual performance of Tesla. I should post it back here later once I do it.

That’s pretty crazy that the files you get are that big. I specifically tell my vendors when they do conversion from CAD to Maya/Max to keep them within 5-6 million polys as there is really no reason for them to be bigger even for high res print output. The print res shots I do end up being around 8K to 13K tops, but that’s a size of an actual composed image from my photoshoots, the car within the frame could be 3K or 4K render as I tend to leave nice amount of room around the car, usually don’t do tight crops, especially for web where the images will be used in many places at difference aspect ratios. And it the past I did 4K car output with scanned data converted into Maya and Max that was only 2 million polys and that held up really well for advertising shots.

Good to know that 6mill poly model will fit within the 3GB or so. I was going to test the GPU with GTX 670 4GB or GTX 680 4GB version and then see how to proceed from there. And if one day I need Tesla I can always get that.

I also haven’t been experiencing any crashes with Max and Vray, very rarely. But I can really push it hard for days without crashing so I wonder if there is something in your hardware configuration that causes that.

Thanks a lot for your response!

Charles

]]> Comment on GTX/Quadro/Tesla – my opinion on today’s GPU selections for rendering by Jeff http://jeffpatton.net/2010/11/gtxquadrotesla-my-opinion-on-todays-gpu-selections-for-rendering/#comment-7500 Jeff Wed, 16 May 2012 17:19:24 +0000 http://jeffpatton.net/?p=202#comment-7500 "So my million dollars question is how fast is Tesla 2075 in relation to CPU’s Cinebench scores. And what the Real Time speed advantage would be over E5-2660 – 2.2Ghz, if there is any." - I don't know how I can translate GPU performance into CPU Cinebench scores. I have spoken with people that have tested dual xeon's against tesla GPUs and the tesla's were faster. However, that was last year. Here's one example from "cf-ntu" post <a href="http://www.maxforums.org/threads/iray_gpu_cpu_comparison_test/0004.aspx" title="http://www.maxforums.org/threads/iray_gpu_cpu_comparison_test/0004.aspx" target="_blank" rel="nofollow">HERE</a>. <strong>Quote:</strong> <em>"cf-ntu 2x 6core Xeon X5660 @ 2.8Gig (with 2x Tesla C2050 fitted) = 19seconds (17 seconds rendering time, 2 seconds conversion time) 2x 6core Xeon X5660 @ 2.8Gig (No CUDA enabled) = 60 seconds I wonder if its fair to say that one Tesla C2050 is worth around 2x 6core Hyper Threaded Xeons (24 cores) in terms of iRay rendering power? Of course, they also offers a great way to pack a load of power into one box :)"</em> I don't know how that holds up to today's fastest Xeon's though. I feel that I need to say this too though. You mentioned your scenes are typically in the 5-6 million polygon range. A 7 million polygon scene will weigh in around 1gb (depending on number of textures, output size, whether or not the GPU also drives a monitor, etc.) so IMHO the 6GB tesla is overkill for your scenes. You can save some cash and get a 2gb or 3GB GPU that should handle those scenes nicely. Unfortunately the CAD vehicles I work with are now in the 16-22 million polygon range and with textures and 7k to 11k output resolution I'm using anywhere from 4gb to 5gb of GPU memory so that's why I have to use the 6GB models. Hope that helps some? “So my million dollars question is how fast is Tesla 2075 in relation to CPU’s Cinebench scores. And what the Real Time speed advantage would be over E5-2660 – 2.2Ghz, if there is any.” – I don’t know how I can translate GPU performance into CPU Cinebench scores. I have spoken with people that have tested dual xeon’s against tesla GPUs and the tesla’s were faster. However, that was last year. Here’s one example from “cf-ntu” post HERE.

Quote:
“cf-ntu
2x 6core Xeon X5660 @ 2.8Gig (with 2x Tesla C2050 fitted) = 19seconds
(17 seconds rendering time, 2 seconds conversion time)

2x 6core Xeon X5660 @ 2.8Gig (No CUDA enabled) = 60 seconds

I wonder if its fair to say that one Tesla C2050 is worth around 2x 6core Hyper Threaded Xeons (24 cores) in terms of iRay rendering power?

Of course, they also offers a great way to pack a load of power into one box :) ”

I don’t know how that holds up to today’s fastest Xeon’s though.

I feel that I need to say this too though. You mentioned your scenes are typically in the 5-6 million polygon range. A 7 million polygon scene will weigh in around 1gb (depending on number of textures, output size, whether or not the GPU also drives a monitor, etc.) so IMHO the 6GB tesla is overkill for your scenes. You can save some cash and get a 2gb or 3GB GPU that should handle those scenes nicely.

Unfortunately the CAD vehicles I work with are now in the 16-22 million polygon range and with textures and 7k to 11k output resolution I’m using anywhere from 4gb to 5gb of GPU memory so that’s why I have to use the 6GB models.

Hope that helps some?

]]> Comment on GTX/Quadro/Tesla – my opinion on today’s GPU selections for rendering by Charles http://jeffpatton.net/2010/11/gtxquadrotesla-my-opinion-on-todays-gpu-selections-for-rendering/#comment-7490 Charles Wed, 16 May 2012 04:09:17 +0000 http://jeffpatton.net/?p=202#comment-7490 Hi Jeff, I'm on a fence about a new system that I need to get for product rendering work. It's pretty much all stills for advertising and web. Car CAD models I get are usually 5 to 6 million polygons, that includes all trim on layers. Right now I'm using Max with Vray, and Vray RT. I haven't tried iRAY since at the moment my system does not have CUDA cards (it's a MAC Tower running WIN7 64bit). I'm curious about how in real production scenario two Tesla 2075 cards stack up versus i7 3930K or E5 Dual Xeons. For CPU comparison I would go with Cinebench 11.5 scores. Two configurations that I'm looking at are: i7 3930K 6C (6 Core) that gets 10.15 CPU score or so, nicely over clocked will go up 13.3. 2 x Xeon 8C E5-2660 - 2.2Ghz that gets 20.27 score which is quite fast for Vray RT. The dual Xeon would cost around $2200 more. What I'm extremely curious about is how to measure speed of Tesla C2075 versus the CPU. I have found some information but it is so all over the place, and with such a huge discrepancies it is really impossible to determine what is true and what is not. So my million dollars question is how fast is Tesla 2075 in relation to CPU's Cinebench scores. And what the Real Time speed advantage would be over E5-2660 - 2.2Ghz, if there is any. I hope you'd be able to answer. Thanks a lot Jeff, Charles Hi Jeff,
I’m on a fence about a new system that I need to get for product rendering work. It’s pretty much all stills for advertising and web. Car CAD models I get are usually 5 to 6 million polygons, that includes all trim on layers.
Right now I’m using Max with Vray, and Vray RT. I haven’t tried iRAY since at the moment my system does not have CUDA cards (it’s a MAC Tower running WIN7 64bit).
I’m curious about how in real production scenario two Tesla 2075 cards stack up versus i7 3930K or E5 Dual Xeons.
For CPU comparison I would go with Cinebench 11.5 scores.
Two configurations that I’m looking at are:
i7 3930K 6C (6 Core) that gets 10.15 CPU score or so, nicely over clocked will go up 13.3.
2 x Xeon 8C E5-2660 – 2.2Ghz that gets 20.27 score which is quite fast for Vray RT.

The dual Xeon would cost around $2200 more.

What I’m extremely curious about is how to measure speed of Tesla C2075 versus the CPU. I have found some information but it is so all over the place, and with such a huge discrepancies it is really impossible to determine what is true and what is not.

So my million dollars question is how fast is Tesla 2075 in relation to CPU’s Cinebench scores. And what the Real Time speed advantage would be over E5-2660 – 2.2Ghz, if there is any.

I hope you’d be able to answer.

Thanks a lot Jeff,
Charles

]]> Comment on mental ray: Physical Sky tips for architectural interiors by A http://jeffpatton.net/2011/11/mental-ray-physical-sky-tips-for-architectural-interiors/#comment-7485 A Tue, 15 May 2012 23:23:10 +0000 http://jeffpatton.net/?p=1145#comment-7485 I'm not gay... but i love you!!!! : ) Many thanks to have the time and patience to share this with us. It is very helpful for me as i'm learning how to illuminate better. Thanks a lot again! You are great! All the best A I’m not gay… but i love you!!!! : )
Many thanks to have the time and patience to share this with us. It is very helpful for me as i’m learning how to illuminate better.

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]]> Comment on GTX/Quadro/Tesla – my opinion on today’s GPU selections for rendering by Hayscib http://jeffpatton.net/2010/11/gtxquadrotesla-my-opinion-on-todays-gpu-selections-for-rendering/#comment-7468 Hayscib Mon, 14 May 2012 23:04:07 +0000 http://jeffpatton.net/?p=202#comment-7468 I see. I thought there was a properties function in 3Dmax or similar. Thanks for your reply. I see. I thought there was a properties function in 3Dmax or similar.

Thanks for your reply.

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