Can you produce nice renders with Iray in under 10 minutes?

Let's say a scene (four walls, ceiling) and three victoria 7's .

If you have the hardware...but it would have to be really expensive hardware ;). A screamer of a machine might do it as long as it had two Titan X gfx cards in it.

Laurie

How about quick & dirty renders just to test the scene's lighting or something?

You should be able to tell after a min or two if the lighting looks okay and its easy to stop to make corrections. The render will basically start grainy and improve with each iteration.

With the right hardware, very close to real time. :) 

Render speed with Iray is something you can make faster with hardware. 

Yea, you should be able to tell pretty quickly if what the lighting in the scene will be like. I have a crappy old 650 Ti Boost and it doesn't take long at all to be able to tell that as long as I keep the test render small ;).

Laurie

As a solution for a fast preview. You can keep the Aux Viewport small and set the mode to Iray. 

Not a great render, but it should help answer the oringinal question. It needs more work on composition, materials, poses, and lighting, but it has 2 V7's and one Genesis 2 figure and a paper roll  prop (2 "walls" instead of 4 and a roof), lit with only an HDRI. Rendered in 9 min. and 30 sec. on a laptop with a GTX 970M (slower than a desktop 970).

Somehow I got a double post ??? 

This was a 7 min. render (1600 x 2000)

 Speaking of using 2 Titan-Xs, which a few of you are, what kind of PSU do you need to run 2 of those which require 250w of power each? Is an 850w unit going to cover all that & be stable, or not?

The Titan-X has 12Gb of RAM by itself. My main RAM is 16Gb with a quadcore 3.7Ghz I7 proc and 3 HDDs. I may soon replace my C drive with an SSD.  

From my iMac with Nvidia GTX 780M,  Four minutes and 42 seconds...  

Can you produce nice renders with Iray in under 10 minutes?

Let's say a scene (four walls, ceiling) and three victoria 7's .

I find that DS is allot faster than poser. Maybe not 10 minutes but defo faster than poser.

which is hard for me to say as I was a very staunch "I will never go to DS" person.

But truth be told...it is faster. I did a render last night, that with the ray tracing etc would of taken me a better part of 12+ hours in poser...took me an hour in Iray. But I do not have NVIDIA so...

You can do a three character scene with HDRI lighting and background in well under 10 minutes with a reasonable class machine (NVIDIA 7 series card and up, Quad I7 processor, and at least 8 gigs of RAM).

As soon as you start adding scene geometry, the time goes up significantly since all that bouncing around of light takes time to calculate.  I can't get an indoor scene where all the furniture and walls are geometry to render in anything less than an hour with a dual quad core I7, 72 GB ram, NVIDIA 970 card. 

When the scene gets complex enough that IRAY has to fall back on CPU processing because it all doesn't fit in the RAM on the video card, things slow down significantly.

Well, i'm sick to my stomach with intel iris after reading this thread.

you cannot get a decent render in 10mins with cpu only ( late 2014 3.0 ghz mac mini and intel iris )

"You can do a three character scene with HDRI lighting and background in well under 10 minutes with a reasonable class machine (NVIDIA 7 series card and up, Quad I7 processor, and at least 8 gigs of RAM).

As soon as you start adding scene geometry, the time goes up significantly since all that bouncing around of light takes time to calculate.  I can't get an indoor scene where all the furniture and walls are geometry to render in anything less than an hour with a dual quad core I7, 72 GB ram, NVIDIA 970 card. 

When the scene gets complex enough that IRAY has to fall back on CPU processing because it all doesn't fit in the RAM on the video card, things slow down significantly."

Is that a typo or do you really have 72GB of RAM? Holy s###!  What kind of machine do you have?!

 DustRider & Nemesis10,

Would you mind showing a lighting diagram illustrating how you lit your subjects with lRay in DS?  

Just plugged in a simple hdri in the render settings, and put the uber iray shader on the K4 and the freebie outfit:

Generated this in a little over 3 mins on a 980gtx:

"You can do a three character scene with HDRI lighting and background in well under 10 minutes with a reasonable class machine (NVIDIA 7 series card and up, Quad I7 processor, and at least 8 gigs of RAM).

As soon as you start adding scene geometry, the time goes up significantly since all that bouncing around of light takes time to calculate.  I can't get an indoor scene where all the furniture and walls are geometry to render in anything less than an hour with a dual quad core I7, 72 GB ram, NVIDIA 970 card. 

When the scene gets complex enough that IRAY has to fall back on CPU processing because it all doesn't fit in the RAM on the video card, things slow down significantly."

Is that a typo or do you really have 72GB of RAM? Holy s###!  What kind of machine do you have?!

I bought a used Dell Precision T5500 on E-Bay for $350 - two quad core I7's.  Basically a workstation server.  Added the 72 GB of ram for around $600 to max the machine out.  Recently stuck the EVA NVDIA 970 on it for $320, and it has two 2 Terrabyte hard drives at $80 a piece.  So all told I have around $1,400 dollars in it.  Five year old equipment can be pretty awesome if you go about it right.

without an Nvidia video card on an dual Xeon Quad (8/16) 2.6GHz., 64GB RAM, Radeon HD 5770 with 1GB DDR5 (which Iray has no use for) it took 32 minutes to render a pair of glasses with two lights, so a plastic default shader used twice, once with a transparency at 1024x768 No other geometry in the scene. I was able to get better results out of LuxRender in 4 minutes.

If your using a decently powerful system without "a good nvidia card" expecting 10 minutes for a "reasonable" scene is not a realistic result. The engine was developed for Nvidia cards to take advantage of it, not CPU and RAM, they are an afterthought.

Secondly Dual socket is exclusively XEON when it comes to Intel CPU architecture,. You can't run two i7's at the same time on the same board, it doesn't exist.

 DustRider & Nemesis10,

 

Would you mind showing a lighting diagram illustrating how you lit your subjects with lRay in DS?  

Sorry Mark, somehow I missed you post. The lighting was ultra simple, the first render with the 3 girls was an HDRI only. The second image was and HDRI (same as the first) and a photo-metric spot light used for a rim light.

without an Nvidia video card on an dual Xeon Quad (8/16) 2.6GHz., 64GB RAM, Radeon HD 5770 with 1GB DDR5 (which Iray has no use for) it took 32 minutes to render a pair of glasses with two lights, so a plastic default shader used twice, once with a transparency at 1024x768 No other geometry in the scene. I was able to get better results out of LuxRender in 4 minutes.

If your using a decently powerful system without "a good nvidia card" expecting 10 minutes for a "reasonable" scene is not a realistic result. The engine was developed for Nvidia cards to take advantage of it, not CPU and RAM, they are an afterthought.

On the other hand the attached image took 5 minutes 43 seconds for 95% convergence, with a single 4ghz quad core i7. (Granted it took significantly less time with the Video cards turned on.) Image size is 1000x1300.

So whether you can get a decent image in 10 minutes or less depends on your lighting, your subject and your hardware, same as with any other render engine. 

Thanks Diogenes & DustRider for that info. Much appreciated.

One thing I like about IRAY and Octane, that you see at an early stage what your render will look like. Allthough not ready and still grainy, it can look cool from the beginning.

Lux does this too, and I can change the intensity of individual lights as I render which is kinda nice.