iRay crazy rendering times.

Robinson

Holy... whatever.  I just ditched my AMD 7970 and replaced it with a GTX 970.  My render times have gone through the floor.  I can use iRay in a viewport.  My PC hasn't ground to a halt.  I don't have to go away and come back an hour later when I render a tiny 512x384 scene.  The 4K render looks incredible after only 30 minutes.

If you wondered what the craic with iRay was and were wavering over buying an NVIDIA, don't (In the past I've tended to alternate between AMD and NVIDIA for gaming).

AndyS

Congratulation.

Hope your scenes stay low res enough to fit. Otherwise you could look for a long trail to walk while it renders.

I just render a scene 2000x1800, 5 characters and "The Bungalow" and uuupppss !!! Up over 10GB iRay occupies on my memory.  --> CPU only render.
Luckily outdoor, so it "only" needs 6 hours to get rid off those bothering grainy areas in shadowed zones.

Tobor

Not sure I follow. Do you mean "gone through the roof"? To me, something going through "the floor" = FAIL. The other parts of your post seemed to suggest you're having success.

Robinson

Tobor said:

Not sure I follow. Do you mean "gone through the roof"? To me, something going through "the floor" = FAIL. The other parts of your post seemed to suggest you're having success.

The floor is lower than the roof :).  

nicstt

Yeh it's great when you first get your new card; I'm not going to mention that soon it will seem slow. :)

Mattymanx

nicstt said:

Yeh it's great when you first get your new card; I'm not going to mention that soon it will seem slow. :)

First reaction: OMG, this is SOOOOOOO Fast!!!

2 Days later: Ah man, 15 min render, this is SOOOOOOO long!

JQP

I've been really curious about the kinds of render times people get with recent Nvidia cards and iRay, on medium-complexity scenes. But it has seemed kind of pointless to ask, since the Pascal cards are now out, but only just (?) now gotten iRay support. Looking forward to seeing some solid info, as soon as that support is added to DS. My rig takes anywhere from 10 to 30 minutes to render a single G3F with a single hair under the camera lamp, depending on the character I use. I assume Matty isn't referring to 15m render times for anything that simple. In other words, I'm rrrreallly looking forward to being able to render an actual iRay scene in 15m.

AndyS

Mattymanx said:

nicstt said:

Yeh it's great when you first get your new card; I'm not going to mention that soon it will seem slow. :)

First reaction: OMG, this is SOOOOOOO Fast!!!

2 Days later: Ah man, 15 min render, this is SOOOOOOO long!

Yep,

it's ever the same. 

 

Hi JQP,

do you like a test for your GPU-Card?
Please see this "simple" room of the West-Park-Set (WP_Treat). Try to perform an iRay render showing the real displacement of the tiles (upper picture).
Good Luck.
You have to set the Displacement SubD to 8 or better 9.

Please let us know, how quick your card / system quitted.

Processing that workspace iRay Camera, memory ran up to 23 GB. And I only set 1 of the 4 walls to displacement !
I had to wait 45 minutes for the first frame. 1 further hour later I could capture that screenprint.

Mattymanx

JQP said:

I've been really curious about the kinds of render times people get with recent Nvidia cards and iRay, on medium-complexity scenes. But it has seemed kind of pointless to ask, since the Pascal cards are now out, but only just (?) now gotten iRay support. Looking forward to seeing some solid info, as soon as that support is added to DS. My rig takes anywhere from 10 to 30 minutes to render a single G3F with a single hair under the camera lamp, depending on the character I use. I assume Matty isn't referring to 15m render times for anything that simple. In other words, I'm rrrreallly looking forward to being able to render an actual iRay scene in 15m.

It really depends on what you are doing and how the scene is setup.  I have two Zotac 980TI AMP Extremes 6GB running at 1400MHz (boost)

Just for comparison, here are some of my renders and the times they took.  I normally set Iray to 22000 smaples, time is 36000, render quality is 3 and convergence is 99%.  I dont normally wait for convergence to reach the target.  I go based on what my eye sees and stop the render when i am happy with it and can see no more difference.  I also shut off the noise filter as it only slows you down.  Renders will go about twice as fast with the noise filter off.  Leave the firefly filter on however as it is needed and wont slow you down.

 

http://www.daz3d.com/gallery/images/233056 - 25min, 22,000 samples.  One poly mesh light in a primative cube for a room.  I let this one go all the way partly cause I was not paying attention to it and when I saw how far along it was I just let it finish to see the total time

 

http://www.daz3d.com/gallery/images/232571 - about an hour.  About 10000 samples.  Exterior scene set to Sun and Sky @ 12midnight plus all those mesh lights.

 

http://www.daz3d.com/gallery/images/220966 - 2.5 hours.  I forget the number of smaples but its all enclosed with a ton of raytrace reflections and only lit by the built in meshlights

 

http://www.daz3d.com/gallery/images/210111 - I think that one was 18000 samples and only about 15min to render.

 

http://www.daz3d.com/gallery/images/206321 - about an hour to 10000 samples.  Lit by the built in mesh lights.  Sun and sky was the setting and set to midnight as well

 

http://www.daz3d.com/gallery/images/143886 - about 8 min and mayby 3000-5000 samples.  It finished rather fast.  Sun and sky only.

 

I have found that exterior shots take less time unless your shooting in the shade then the indirect lightng will take longer to clear up.  Scenes lit by only mesh lights will take longer to clear so if there are none inluded in the set, keep it simple and use primatives.  I have not used any of the photometric lights.